vil 36. A computer while calculating the correlation coefficient between two variablesX and Y from 25 pairs of observations obtained the following results :N- 25, Σ X- 125 , Σ x2 = 650ΣΥ= 100, ΣΥ-460, Σ Χ Υ- 508erfT (d)mue erlt Cr.0 ed otilln tooosulsv ertt bnit

Obtain the value of the correlation. The value of the correlation coefficient is obtained below:…

Answered: vil 36. A computer while calculating…

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 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?
8/20 Compute the correlation coefficient and determine whether there is a linear relation between X and Y.
We have obtain the following x-y-pairs of data: x 1.8 10 4.2 7 -8.3 y 6.3 9.6 7.4 -1.3 -1.6 Compute the correlation coefficient for this data and enter it to at least 2 decimal places.
7/20 Compute the correlation coefficient and comment on the type of relation that appears to exist between X and Y.
Let Z~Normal(0,1). Define X1 = Z and X2 = Z2. Calculate the Spearman correlation coefficient for the pair (X1, X2).
Suppose Z ~ N(0,1). What is the correlation between Z and |Z|
1. Move the slider so that the correlation coefficient is r = -0.9. At an x-axis value of 40, which of the following is the approximate range (lowest to highest) of the y-values?2. Now move the slider so that the correlation coefficient is r = 0.15. At an x-axis value of 40, which of the following is the approximate range (lowest to highest) of the y-values?
Suppose that X and Y are unknowns with E(X) = 10, Var (X) = 4, E(Y)=12 and Var (Y) = 100. In addition, suppose that the correlation coefficient of X and Y is .6. Then what is the variance of X-Y?
12/20 Compute the linear correlation coefficient between the weight of a car and its miles per gallon. R =_. Round to three decimal places as needed.
Compute the correlation coefficient, r for the data set: (0, −2) (1, 4) (2, 2) (Hint: Use your answers from Problem 2, since it is the same data set and recall that r = (sigma-sign)ZxZy/n-1 where zx is the z-score for x-coordinate and zy is z-score for y-coordinate.)
Suppose you will perform a test to determine whether there is sufficient evidence to support a claim of a linear correlation between two variables. Find the critical value(s) of r given that n = 20 and α = 0.05. Group of answer choices r = ±0.632 r = ±0.456 r = ±0.811 r = ±0.444
If the correlation coefficient obtained from data pairs of variables X and Y is 0.98 the strength and direction of the relationship between X and Y is which of the following: (i) very strong positive (ii) moderate positive (iii) moderate negative (iv) very weak negative

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vil 36. A computer while calculating the correlation coefficient between two variabies X and Y from 25 pairs of observations obtained the following results : erT (d)- brie Πεν N-25 , ΣΧ- 125, Σ Χ2650 ΣΥ- 100, ΣΥ2460, Σ Χ Υ-508 aulsv erl bnit o pe o43 M tood %D mua erlt %3D