Q6. Given the equation for the correlation coefficient,nEXY-EXEYJenEx-(Ex'XEr'-(Er)find the value of r when:n= 10, ΣΧΥ- 100; Σ X = 25 ; ΣΥ = 40%3D%3|%3DHint: This can be done at sight:A. r= 0 B. r=-0.4 C. r= 0.6 D. 0.75

The strength of association between the two numerical variable is understand using correlation. It…

Answered: Q6. Given the equation for the…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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q15
A random sample of college students was surveyed about how they spend their time each week. The scatterplot below displays the relationship between the number of hours each student typically works per week at a part- or full-time job and the number of hours of television each student typically watches per week. The correlation between these variables is r = –0.63, and the equation we would use to predict hours spent watching TV based on hours spent working is as follows: Predicted hours spent watching TV = 17.21 – 0.23(hours spent working) Since we are using hours spent working to help us predict hours spent watching TV, we’d call hours spent working a(n) __________________ variable and hours spent watching TV a(n) __________________ variable. The correlation coefficient, along with what we see in the scatterplot, tells us that the relationship between the variables has a direction that is _________________ and a strength that is ______________________. According to the…
The multiple correlation (R) is: The correlation between predicted and observed scores. The sum of the simple r's. The highest simple r. Always between 0 and 1 (inclusive).
Please show work
Please solve for the value of correlation given the following.
Use the given information to find the coefficient of determination. Find the coefficient of determination, given that the value of the linear correlation coefficient, r, is 0.611.
Correlation
Q6 Given a data set where the response variable is normalized ( centered ) and it is know that the correlation between the individual predictor variable & response variable is, r 0.9. And, it is found that S,-10 and X=100. (i) Find B= a. Write the formula for B= (ii) Find B= (iii) (iv) Find the value the predictor, which yields the response variable to be 1 X Q7 There are several assumptions which are needed to be verified prior to using a univariate regression model and/or doing any traditional model analysis ( e.g. need to verify these assumptions prior to doing the actual regression or F/T tests etc ). Write down the two most essential mathematical assumptions needed by explaining them in a brief written statement (i) 1" = (ii) 2* = answer both questions plese
Would you say the correlation is positive or negative? positive O negative (c) Use a calculator to verify that Σ * Ex=61, Ex Computer. (Round your answer to four decimal places.) 0.9802 Need Help? cloudy = 1007, x2 = 1007, Σy = 634, Σ Master It As x increases from 3 to 23 months, does the value of rimply that y should tend to increase or decrease? Explain y O Given our value of r, y should tend to decrease as x increases. Given our value of r, y should tend to increase as x increases. Given our value of r, we can not draw any conclusions for the behavior of y as x increases. O Given our value of r, y should tend to remain constant as x increases. Q Search = 14 mmm 90,298, and Exy = 9,315. hp 9 |99+ X
QI For the next data ,the correlation factor ( r) is: * X : x: 2 5 8 11 14 And y = 4 x
See picture for problem. Thx
q10

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Q6. Given the equation for the correlation coefficient, nEXY-EXEY find the value of r when: n = 10, ΣΧΥ - 100; Σ Χ = 25 ; ΣΥ- 40 %| || Hint: This can be done at sight: A. r= 0 B. r=-0.4 C. r = 0.6 D. 0.75