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In a simple linear regression problem, the following statistics are calculated from a sample of 10 observations: Σ(x-x)(y-ỹ)= 2250, s₂ = 10, Σx = 50, Σy = 75. The least squares estimates of the slope and y-intercept are respectively: a. 1.5 and 0.5 b. 2.5 and 1.5 C. 1.5 and 2.5 d. 2.5 and -5.0 If a simple linear regression model has no y-intercept, then: all values of x are zero b. all values of y are zero c. when y = 0 so does x d. when x = 0 so does y a.

In a simple linear regression problem, the following statistics are calculated from a sample of 10 observations: Σ(x-x)(y-ỹ)= 2250, s₂ = 10, Σx = 50, Σy = 75. The least squares estimates of the slope and y-intercept are respectively: a. 1.5 and 0.5 b. 2.5 and 1.5 C. 1.5 and 2.5 d. 2.5 and -5.0 If a simple linear regression model has no y-intercept, then: all values of x are zero b. all values of y are zero c. when y = 0 so does x d. when x = 0 so does y a.

MATLAB: An Introduction with Applications
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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In a simple linear regression problem, the following statistics are calculated from a sample of 10 observations: = 50, (x-7)(y-y)= 2250, s,= 10, x Σy = 75. The least squares estimates of the slope and y-intercept are respectively: 1.5 and 0.5 2.5 and 1.5 c. 1.5 and 2.5 d. 2.5 and -5.0 If a simple linear regression model has no y-intercept, then: all values of x are zero b. all values of y are zero c. when y = 0 so does x when x = 0 so does y d. a. b. a.
Transcribed Image Text:In a simple linear regression problem, the following statistics are calculated from a sample of 10 observations: = 50, (x-7)(y-y)= 2250, s,= 10, x Σy = 75. The least squares estimates of the slope and y-intercept are respectively: 1.5 and 0.5 2.5 and 1.5 c. 1.5 and 2.5 d. 2.5 and -5.0 If a simple linear regression model has no y-intercept, then: all values of x are zero b. all values of y are zero c. when y = 0 so does x when x = 0 so does y d. a. b. a.
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