Correlation questions and answers pdf

Correlation analysis is a statistical technique to study the degree and direction of relationship between two or more variables. Four scatter plots with fitted lines are shown below. . Where I measure cell dry weight (unit: mg/L), cell density (unit: ×10^5 cells/ml Oct 10, 2019 · Correlation. no correlation B. Class 11 Correlation Notes assist you with overviewing the chapter in minutes. 2 Correlation & Regression for the DP IB Maths: AA SL syllabus, written by the Maths experts at Correlation is a statistical method or technique that measures a quantitative relationship between different variables, such as demand and price. Step 2: Click “Stat”, then click “Basic Statistics” and then click “Correlation. 2: Three scatterplots showing negative, positive, and zero correlation. Multiple Correlation: Under Multiple Correlation three or more than three variables are studied. 34+0. Do the data provide convincing evidence that there is a linear relationship between the number of white males in the population and the homicide rate? Carry out an appropriate test at a significance level of 0. A. You can Practice Online GK test Questions for Competitive exams. The Pareto principle is often applied to business to explain that 80% of the profits or results come from 20% of the efforts. Jan 2, 2024 · The Pareto principle states that 80% of the effects or results in an experiment come from 20% of the causes. “Correlation” is selected from the “Stats > Basic Statistics” menu. 6. Y= -65. A negative value of r describes negative correlation. Correlation and Regression. 59. 7 Residual Analysis 12. Calculate the simple correlation coefficient between wing length & tail length of the following 12 birds of a particular species. It is always a good practice to examine the scatterplot before completing any correlation analysis. 355(75) = 71. The relationship between the variables is modelled by the regression line with equation \ (y = ax + b\) (a) Find the value of \ (a\) and of \ (b\) (b) Write down the correlation coefficient. 99 KB. 92] /Contents 4 0 R From reg. Tell me about your worst boss. Full-Length Linear Practice Test 2: Questions | Answers | Answer Explanations. negative correlation D. • Answer all questions and ensure that your answers to parts of questions are clearly labelled. You could first begin by plotting your data on a scatter graph to see if there appeared to a correlation between the two sets of data. Whenever some ordering of sampling units is present, the autocorrelation may arise. Example #10. Rank correlation coefficient is 0. 93*X. S, t, y ) Partial correlation: analysis recognizes more than two variables but considers only two variables keeping the other constant. 85. ln(Qt) = 0 + 1ln(Pt) + 2ln(Yt) + ut, where Qt and Pt are the quantity (number) and price of haircuts obtained in Cambridge in year t and Yt is mean income in Cambridge in year t. For each stone measure its Be careful - It would not make sense to compare the residual mean squares of the two models because the scales of measurement involved are different. r can take any value such that. 7) Use the regression equation to predict a student’s final course grade if 75 optional homework assignments are done. ) either a positive, negative or non-linear relationship between X and Y when all other variables that affect Y are held constant Mar 10, 2024 · Get Spearmans Rank Correlation Coefficient Multiple Choice Questions (MCQ Quiz) with answers and detailed solutions. MCQs on Correlation and Regression. e. 39% of the total variation is explained by the dependent variable. P DC = 8π watt , P AC = 15π 2 /16 watt. The researcher studied 200 workers of each type. 1237. 082. Free Accessibility: Students can access the Correlation questions from the Class 11 NCERT Economics Solutions at any hour of the day as it is easy accessibility. Mar 9, 2024 · Covariance Question 6. Answer. 39% of the total variation is explained by the independent variable. ”. 5 %µµµµ 1 0 obj >>> endobj 2 0 obj > endobj 3 0 obj >/XObject >/ProcSet[/PDF/Text/ImageB/ImageC/ImageI] >>/MediaBox[ 0 0 595. STATISTICS 8 CHAPTERS 1 TO 6, SAMPLE MULTIPLE CHOICE QUESTIONS. May 26, 2024 · Answer: 2. Find the means of X and Y. 91. In the case of 2D convolution we flip the filter both horizontally and vertically. correlation coefficient. Download Solution PDF. PubH 7405. The first panel shows a negative correlation. None of the preceding; Answer: 3. C) The sample coefficient of correlation Corr (A, B) = 1. This document provides the answers to 14 multiple choice questions about correlation. It is merely a scale-localized version of the usual cross-correlation between two signals. Step 3: Click a variable name in the left window and then click the “Select” button to move the variable name to the Variable box. An r value of exactly -1 indicates a perfect negative correlation z If there is no linear correlation or a weak linear correlation, r is close to 0. This requires computing two sets of correlations, 1 for each class. [3 marks] Level 1-3 GCSE KS3 AQA Edexcel OCR WJEC Cambridge iGCSE. The document contains 9 questions regarding calculating and interpreting product moment correlation coefficients using statistical data. The following Table reveals the effect (or degree) of coefficient of correlation. Calculate . . (d) negative correlation. What is the significance of hypothesis testing? It is a significant assessment of issue; It’s a way of making a powerful statement. Answer: Correlation is a statistical method or a technique that measures a quantitative relationship between different variables, such as demand and price. Alex is a customer who visited the restaurant on Regression and Correlation Methods 12. Correlation coefficients provide insights into the degree of association between variables, ranging from -1 to +1. These Notes are prepared by our expert teachers at cbsencertsolutions. Under simple correlation problem there are only two variables are studied. 7. 39 also. Mar 24, 2024 · To aid in your preparation for exams like UPSC, SSC, Railways, NTPC, Banking, UGC NET, etc. 24. Another source of autocorrelation is the effect of deletion of some variables. Resource type: Assessment and revision. Print Worksheet. PDC = 4 watt , PAC = 30π3/16 watt. The equation of the regression line (in the form y = a + bx) becomes: y = 208. 32 841. 90, or $936,900. A Level AQA Edexcel OCR. 4) Buying popcorn causes people to buy soda. C, P. Decide whether you will carry out a 1—tail or 2—tail test (it is usually given in the question). A correlation is the relationship between two sets of variables used to describe or predict information. 5 Prediction Intervals for Future Response Values 12. Find the correlations between hours spent studying and how students performed in their potions and defense against the dark arts classes. 3) equal to −1. pdf), Text File (. Correlation and regression both pertain to data measured in pairs – called bivariate data. Compare the values for R2 to the scatter seen. (b) perfect positive correlation. Correlation Coefficient MCQs evaluate learners knowledge of coefficient calculation The Class 11 Economics NCERT Solutions Chapter 7 Correlation are designed in a way that will help to improve the overall understanding of students. 355(x) ⇒ x » 113. See full list on madasmaths. 100log10(Y)= -48. 1: Determining If There Is a Relationship Correlation-Exam Questions with answers - Free download as PDF File (. doc. Nov 25, 2023 · Now you will see the exercise questions answers of Correlation and download pdf link on it. So answer it with a mix of honesty, diplomacy and positivity. • Fill in the boxes at the top of this page with your name. Correlation describes the strength of the linear association between two variables. This scenario applies to Questions 1 and 2: A study was done to compare the lung capacity of coal miners to the lung capacity of farm workers. each beer consumed increases blood alcohol by 1. R2 gives the fraction of the variability of the y values accounted for by the linear regression (considering the variability in the x values). Answer: If more than two variables are involved and the relationship between only two variables is suited for treating other variables as constants Correlation Coefficient Ah-Bach! Name Directiora: Find the letter answer to each question, and place that letter in the saying below above its question number. Question 1: For each of the scatter graphs below, state whether or not there is correlation and, if so, state the strength and type of correlation. (a) Find, to 3 decimal places, the Spearman rank correlation coefficient between the distance. A fth grade class conducted a 5-minute experiment that involved heating time and water temperature. Also work out the values of the regression coefficient and correlation between the two variables X and Y. (c) Use your equation to estimate the mean weight of a child that is four years old. It takes values between -1 (perfect negative) and +1 (perfect positive). So Please Bookmark this post to receive There!are!multiple!ways!to!calculate!acorrelation!coefficientr!(thatis,!astandardized!indicator!of!the! relation!between!two!variables). 4. All questions and answers from the Sandeep Garg Book of class 11 Commerce Economics Chapter 8 are provided here for you for Jun 9, 2012 · of pregnancy]? Correlation analysis helps answer questions such as these. It also analyzes a correlation matrix to determine the relationships between variables like birth weight, mother's weight, smoking, and prenatal care. If you’re seeking expert guidance while preparing for competitive exams 0. Correlation is a measure of how closely linked the two data sets are, and how they affect each other. These GK questions and answers cover a wide range of topics and will be immensely helpful in your exam preparation. PDC =8π watt, PAC = 30π 3 /16 watt. We can write the formula for this as: * I ( x ) = F ( i ) I ( x - i ) = - N. • If pencil is used for diagrams/sketches/graphs it must be dark (HB or B). When the normalizations (2) are applied first, the operation is called normalized cross-correlation. This is a tricky question. This waiting time is dependent upon the number Of Other customers already seated in the restaurant. Fig. It includes definitions of correlation and the coefficient of determination. 1. 55 × 3. Below is a list of multiple-choice questions and answers on Correlation and Regression to understand the topic better. : BIOSTATISTICS REGRESSION, 2011. 1 The Simple Linear Regression Model 12. Correlation only tells us about the first condition, not about the two others. In cross-correlation, you determine the similarity between two sequences by Correlation is a statistical technique to ascertain the association or relationship between two or more variables. The correlation coefficient is 0. !Wecan!calculate!the Feb 1, 2018 · PDF | Correlation in the broadest sense is a measure of an association between variables. Question 2: Rey recorded the heights and weights of her students in the table below: 20. Calculate the co-efficient of raqnic correlation from the following data: Answer: Students can Download Economics Chapter 7 Correlation Questions and Answers, Notes Pdf, 1st PUC Economics Question Bank with Answers helps you to revise th. 4 Inferences on the Regression Line 12. E: Correlations (Exercises) is shared under a CC BY-NC-SA 4. 1 Ideas for data collection Undertake at least one of the three activities below. Class XI Statistics Chapter 7: Correlation. Estimates of Regression Line Parameters. Answer: C. Find the correlation coefficient between the Average Number of Assignments in Class and the Class Absences. positive then negative correlation 6. 19E – 08 or 0. Dan has a keen interest in statistics and probability and their real-life applications. State the null hypothesis: it is always “ there is no association between the two variables” 3. PRACTICE PROBLEMS FOR SIMPLE LINEAR REGRESSION. decode the message. You would need to do a separate Spearman’s rank correlation test for each set of pairs of data and for each time period. pdf, 391. Goodness of Fit Multiple R: 0. 8 Variable Transformations As well as teaching maths for over 8 years, Dan has marked a range of exams for Edexcel, tutored students and taught A Level Accounting. ppt - Free download as Powerpoint Presentation (. Regression, on the other hand, evaluates the relationship between an independent and a dependent variable. Table 10. 1 x 80) = 936. txt) or read online for free. equation of x on y = −. 5 give us an idea of the relationship between two variables. Sep 14, 2021. Example # 5 The regression equation of y on x is + 3 − 88 = 0 and that of regression equation of x on y is 2 + − 71 = 0. 44*X. This result means that. If all the points lie on the same downward sloping line, the correlation is said to be. Using this equation, it is easy to forecast total costs at different levels of production, for example for a production level of 80,000 units, the estimate of total cost will be: 208. Remember that there were three conditions for causality: there is a relationship between a and b, a comes before b in time, and no third variable is the underlying cause of the relationship between a and b. com a. 0 license and was authored, remixed, and/or curated by Lawrence Kaplan & Amadeo Pesce. 1 At a certain small restaurant, the waiting time is defined as the time between sitting down at a table and a waiter first an-iving at the table. Parameters estimations for dependent = Boiling Point. 8) Use the regression equation to compute the number of optional homework assignments that need to be completed if a student expects an 85. Then the correlation of Xand Y is Corr(X;Y) = Cov(X;Y) p Var(X)Var(Y): Intuition 2. 99375 or 99. Table 1. Worksheet. (b) Stating your hypotheses clearly and using a 5% one-tailed test, interpret your rank. That is, we have ranked the albums in terms of what was released first (rank = 1) and what was released last (rank = 8). [6 points] Answer: The price elasticity of demand is 1, which is the derivative of ln(Qt Jun 20, 2023 · CA Foundation Paper 3: Business Mathematics, LR and Statistics : Chapter 17: Correlation And Regression Notes, Charts & Lectures All Compilation AT One Place in PDF April 17, 2022 CA Student Friend Hello Dear CA Foundation Students, We are Sharing With You Notes and Lectures of CA Foundation Paper 3: Business Mathematics, Logical Reasoning and 2. Negative correlation occurs when one thing goes up and the other thing goes down; or, when more of X is less of Y, and vice-versa. The questions involve calculating summary statistics such as means, variances, and The correlation is said to be linear if the scatter points lie near a line or on a line. Calculate DC power and AC power for the given random process. The PMCC of a sample is denoted by the letter. 187-191) Many scientific investigations often involve two continuous vari-ables and researchers are interested to know whether there is a (linear) relationship between the two variables. For example, a researcher wishes to investigate whether there is a relationship Sep 8, 2022 · This “General knowledge questions and answers for competitive exams pdf” Blog will be updated Daily and more General Knowledge, General Awareness and Current Affairs Pdf and Question and Answers on Gk will be added. All questions are from the Edexcel GCSE Covariance and Correlation Questions and Answers. And the correlation coefficient is the degree in which the change in a set of variables is Figure 3. when the window is slid over all possible image positions (r;c)—is called cross-correlation, or correlation for short. ) either positive, negative or non-linear relationship between X and Y D. You will need your data for further analysis later in this chapter. The answers to each question in Chapter 7 Correlation of Economics Class 11 has been designed based on the latest syllabus released for the current year. 6 The Analysis of Variance Table 12. The questions cover interpreting correlation values, determining the strongest 2) between 0 and 1. Suppose that Xand Y are jointly distributed random variables with non-zero variances. Tags : Problem Questions with Answer, Solution | Correlation and Regression analysis | Statistics , 11th Business Mathematics and Statistics(EMS) : Chapter 9 : Correlation and Regression analysis Study Material, Lecturing Notes, Assignment, Reference, Wiki description explanation, brief detail questions can be answered using regression and correlation. 3) There is no correlation between popcorn sales and soda sales. In regression modeling, it is not possible to include all the variables in the model. Using your answers. The relationship between number of beers consumed (x) and blood alcohol content (y) was studied in 16 male college students by using least squares regression. Answer (Detailed Solution Below) Option 1 : 357. 158. 78% 98% sales are accounted for by the variations of the Price, Advert and Hours of Sunshine. 4. Express the price elasticity of demand in terms of the coefficients in (1). A correlation coefficient is a statistical measure of the degree to which changes Practice with Correlation -- Answers. ppt), PDF File (. At exam time, Revision note is one of the best tips suggested by educators during exam times. (Some are new & Some from Old exams; last 4 are from 2010 Midterm) Problem 1: The Pearson Correlation Coefficient (r) between two variables X and Y can be expressed in several equivalent forms; one of which is. In this chapter you will see how to quantify answers to questions of the type above, based on observed data. answer: SP = 272; SSx = 280; SSy = 280; r = . R x x ( τ) = 4 + π s i n 6 π τ 16 τ + ( s i n 3 π τ 4 τ) 2. Correlation doesn’t in itself imply causation. Correlation and Regression Questions_Answers (1). 05 to help answer this question. Scribd is the world's largest social reading and publishing site. There are more chapters to study besides Correlation in this subject. Happiness goes down as chocolate supply increases. 4 answers. Definition of Correlation, its Assumptions and the Correlation Coefficient Correlation, also called as correlation analysis, is a term used to denote the association or relationshipbetween two (or more) quantitative variables. The following regression equation was obtained from this study: != -0. C. 3 Inferences on the Slope Rarameter ββββ1111 NIPRL 1 12. Download these Free Spearmans Rank Correlation Coefficient MCQ Quiz Pdf and prepare for your upcoming exams Like Banking, SSC, Railway, UPSC, State PSC. 85830+0. Revision notes on 4. The results of the experiment are represented in the line graph below. Age range: 14-16. Exam Questions and mark scheme on Spearman’s Rank Correlation Coefficient (SRCC) and Pearson’s Moment Correlation Coefficient (PMCC) for Edexcel GCSE (9-1) Statistics. a student’s test scores, and d, the student’s success in college, is modeled by the Based on this linear regression model, the correlation coefficient could be. Also remember For example, convolution of a 1D image with the filter (3,7,5) is exactly the same as correlation with the filter (5,7,3). 06 KB. Grade =44. 27%. 50 Common Interview Questions and Answers Page 8 of 25 9. correlation coeffic 2,440,125. Feb 29, 2024 · Subject: Mathematics. 8 + 0. 39% There is almost perfect correlation between sales and the Price, Advert and Hours of Sunshine. 1 Introduction (P. 4) equal to 0. Scatter diagrams spanning over Fig. Question: 7. 2: Degree and Type of Correlation Review and cite PEARSON'S CORRELATION protocol, troubleshooting and other methodology information | Contact experts in PEARSON'S CORRELATION to get answers May 21, 2023. (a) perfect correlation. Mar 6, 2024 · Autocorrelation Question 1: Autocorrelation of a random process X (t) is given by. 3. Available in the PDF: The questions of from NCERT Class 11 Economics Solutions are available in the portable document format so that students can d0wnload from their electronic device. (a). (c) perfect negative correlation. Also test its significant. Regression is the line of best fit. Mar 3, 2024 · Correlation Coefficient MCQs are essential for assessing ones understanding of this statistical measure that quantifies the strength and direction of the relationship between variables. 1: Determining If There Is a Relationship Jan 8, 2024 · Test for a significant relation using the four step hypothesis testing procedure. Your solution’s ready to go! Our expert help has broken down your problem into an easy-to-learn solution you can count on. Full-Length Linear Practice Test 1: Questions | Answers | Answer Explanations. cient, and R or r. Aug 23, 2019 · Correlation coefficient problems and solutions - correlation and regressionSolved Queries -correlation coefficient problems and solutions. We have also provided detailed explanations Microsoft Word - SampleMT1MCKey. This page titled 12. The date refer to the yield of grain in gms|plant(y) and the number of productive tillers (x) and 15 paddy plants. The following data relates to the yield in grams(y) and the Use Pearson’s formula ( r) to calculate Spearman’s Γs. + 3 − 88 = 0 −−−− −(i) ×2. Question 2. What prediction can be made based on the information gathered? A. 0 license and was authored, remixed, and/or curated by Foster et al. Question. Full-Length Linear Practice Test 3: Questions | Answers | Answer Explanations. This would help you to see quickly if the relationship was a positive or negative one. B) The sample covariance Corr (A, B) = 0. The unit of correlation coefficient between height in feet and weight in kgs is (a) kg/feet (b) percentage (c) non-existent Answer: (c) Correlation coefficient (r) has no unit. 10 5 8 10 5 11 8 14 1 6 10 11 6 15 3 4 16 18 18 12 2 William Watt 10 1. R Square: 0. Ex. In time-series data, time is the factor that produces autocorrelation. To introduce both of these concepts, it is easier to look at a set of data. D. Quiz & Worksheet Goals The College Board currently offers 4 official, printable practice tests that model the new digital SAT format. Significance F: 5. This analysis is fundamentally based on Sep 26, 2015 · Question. Apr 16, 2023 · Question 7. A positive value of r describes positive correlation. 1x. The data is displayed in the following table: A) The sample covariance Corr (A, B) = 0. For the question about correlation, a correct answer was given by 52% (95% Correlation Hypothesis Testing Instructions • Use black ink or ball-point pen. We use to indicate the population correlation coe to indicate the sample correlation coe cient. 987936 or 98. z If x and y have a strong negative linear correlation, r is close to -1. Correlation is the ratio of the covariance between two random variables and the product of their two standard deviations i. 0180x The above equation implies that__________. Scatter Graphs Example Questions. Correlation and Regression objective questions with answers pdf download online exam test Pearson’s product-moment correlation coefficient (PMCC) is a way of giving a numerical value to a linear relationship of bivariate data. 2. 1 shows a scatter around an upward rising line indicating the movement of the variables in the same direction. FREE NCERT Solutions for Class 11-commerce Economics Chapter 7 - Correlation from NCERT Textbook (Statistics For Economics Ncert Solution) for Karnataka Board. We collected three quantitative variables from each patient: 1) their score from a wellness questionnaire, 2) their age, and 3) the number of therapy sessions completed with their current therapist. s y y s x x n r X Y. Correlation De nition 2. 61. 786 = 2. 18 to 40%) of participants. , we’ve compiled over 1000+ GK questions and answers below. Back to top Licensing Jul 30, 2021 · Download Correlation Class 11 notes PDF and score well in the exam. ( University of Missouri’s Affordable and Open Access Educational Resources Initiative) via source content that 1) There is a negative correlation between popcorn sales and soda sales. Total Feb 23, 2024 · He is fascinated by the idea of artificial intelligence inspired by human intelligence and enjoys every discussion, theory or even movie related to this idea. txt) or view presentation slides online. View NCERT Solutions for all chapters of Class 13. Solution: Solving the two regression equations we get mean values of Study with Quizlet and memorize flashcards containing terms like A causal effect of X on Y is defined as: A) a non-zero correlation between X and Y B. Class 11 Economics Worksheet for Statistics for Economics Chapter 7 Measures of Correlation. Regression and Correlation 12. Define partial correlation. Pick a real example (make sure it’s not about someone working in the company you want to join), but be discreet about the person’s identity. 2 Fitting the Regression Line 12. 12. Correct answers are in bold italics. 85 = 44. of the shop from the tourist attraction and the price of an ice cream. 10. n i y i x i. To illustrate, 80% of customers buy 20% of the items. Highly Rated GK App. Jul 28, 2023 · Correlation MCQ for Class 11: Get here Correlation Multiple Choice Questions and Answers, Download the free PDF of CBSE Class 11 Economics, Chapter 6 of Statistics for Economics. File previews. 2. No. Determine the covariance and correlation for the joint PDF fxy (x, y) = e-x-y over the range x>0, y >0. From the t-distribution (refer the table given at the end of this unit) with 10 degrees of freedom for a 5% level of significance, we see that the table value of t = 2. Correlation is a statistical tool that shows the association between two variables. A value of 0 indicates no linear association. 0127 + 0. If the correlation coefficient between X and Y is 0. could be the approximate value of the correlation coefficient for the scatter Answer: As the correlation coefficient between the two variables is +1, so the two variables are perfectly positive correlated. 1. pdf, 645. = 0. It is a rule for accepting or rejecting the research problem’s hypothesis. These solutions for Measures Of Correlation are extremely popular among class 11 Commerce students for Economics Measures Of Correlation Solutions come handy for quickly completing your homework and preparing for exams. 5. 18. May 12, 2022 · Question 1. positive correlation C. 90 + (9. B. Activity 1 Collect a random sample of twenty stones. Answer: Question 8. Determine whether the following Beatles album popularity in terms of sales were related to when they were released. Regression answers whether there is a relationship (again this book will explore linear only) and correlation answers how strong the linear relationship is. %PDF-1. Q. 90 + 9. Again, you could use the covariance method of the Z score method. 7 common correlation questions and answers include causation, simple linear regression, covariance and more. The rank correlation method is used when the variables are qualitative, such as bravery, beauty, virtue, wisdom, etc. It is a Home | Toot Hill School The correlation \(r\) The coefficient of determination \(r2\). Deduce whether there is a positive or negative In a laboratory experiment on correlation research study the equation of the two regression lines were found to be 2X–Y+1=0 and 3X–2Y+7=0 . NCERT Solutions for Class 11 Economics . Also, are X and Y are independent? Here’s the best way to solve it. 97. 1 to Fig. d = f ( P,P. An hypothesis test using Spearman’s rank correlation coefficient is very similar to one conducting using PMCC. 2) There is a positive correlation between popcorn sales and soda sales. Correlation(Ri,Rj) = Covariance(Ri,Rj) Standard deviation(Ri)∗Standard deviation(Rj) Correlation ( R i, R j) = Covariance ( R i, R j) Standard deviation ( R i) ∗ Standard deviation ( R j) It measures the Solution: Let us take the null hypothesis (H 0) that the variables in the population are uncorrelated. Read on. 228. 2 A linear regression equation of best fit between a student’s attendance and the degree of success in school is. Click the Download PDF link to obtain the Correlation questions with answers document. The Pearson Correlation Coefficient is an important formula to know in statistics, and this quiz/worksheet will help you test your understanding of its application. Calculate correlation between the two variables. ) a positive relationship between X and Y C. 357. Since each image position (r;c) yields a value ˆ, the result is another image, although the pixel values now Statistics 1 Correlation and Regression Answers. I performed a growth performance experiment of microalgae with four treatment. 0000000519 The entire regression is significant. Find i) Mean values of x and y ii) Coefficient of correlation SOL: To find mean values , solve two regression equations. Remember back in multivariable calculus that if you take vectors v;w 2Rn we could de ne the dot-product vw of the two vectors. 8 and covariance is 121 and the variance of Y is 64, then variance of X will be. Worked Solution. 6 The table below shows the time, in hours, spent by students on electronic devices and 1)View SolutionPart (a): Part (b): Part (c): Part (d): Part […] Nov 22, 2020 · This page titled 1: Questions and Answers is shared under a CC BY-NC-SA 4. questions can be answered using regression and correlation. The equation of the fitted line and the value of R2 are given for each plot. xh gy dm vo to ru db hv sl ki