The formula for β₁ is just: A) Covariance of x and y over variance of y B) Covariance of x and y over variance of x C) Covariance of x and y over the standard deviation of x D) Covariance of x and y over the standard deviation of y E) None of the above is correct

The formula for β₁ is just: A) Covariance of x and y over variance of y B) Covariance of x and y over variance of x C) Covariance of x and y over the standard deviation of x D) Covariance of x and y over the standard deviation of y E) None of the above is correct

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018

18th Edition

ISBN:9780079039897

Author:Carter

Publisher:Carter

Chapter10: Statistics

Section10.5: Comparing Sets Of Data

Problem 14PPS

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Question 4

The formula for β₁ is just:

A) Covariance of x and y over variance of y

B) Covariance of x and y over variance of x

C) Covariance of x and y over the standard deviation of x

D) Covariance of x and y over the standard deviation of y

E) None of the above is correct

Definition Definition Measure of how two random variables change together. Covariance indicates the joint variability or the directional relationship between two variables. When two variables change in the same direction (i.e., if they either increase or decrease together), they have a positive covariance. When the change is in opposite directions (i.e., if one increases and the other decreases), the two variables have a a negative covariance.

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