A computer while calculating the correlation coefficient between two variates X and Y obtained thefollowing constants:N= 25, ΣΧ -125, Σ-650, ΣΥ- 100, ΣΥ-460, ΣΧΥ-508It was, however, later discovered at the time of checking that he had copied two pairs of observationsX | Y14 while the correct values were 8XYas 6128.8Obtain the correct value of correlation coefficient between X and Y.

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Answered: 6 8 -btain the correct value of…

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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A researcher finds a correlation of r x y = + 0.40 with a sample of n = 25 bi-variate observations. Given a null hypothesis of H0: ρ x y = 0 and α = 0.05 , the researcher should: cant tell from the information given reject the null hypothesis fail to reject the null hypothesis
In two sets of variables X and Y with 50 observations each, the following data were observed X = 10, SD of x = 3, y =6 , SD of x = 2 Co efficient correlation between X and Y is 0.3 . however on subsequent verification it was found that one value of X (=10) were in accurate and hence weeded out. With remaining 49 pairs of values, how is the original value of correlation coefficient affected.
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A computer while calculating correlation coefficient between two variables X and Y from 25pairs of observation obtained the following results: n=25, 2X=125, EX2 = 650, Y=100,Y2= 460, 2XY=508. But on subsequent verification it was found that he had copied downtwo pairs as (6,14) and (8,6) while the correct values were (8,12) and (6,8). Obtain the correctvalue of correlation coefficient?
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6 8 -btain the correct value of correlation coefficient between X and Y.