Use the following to answer the questions below:
Computer output from a regression analysis is provided.
The regression equation is Y = 72.9 - 0.519 X

-The sample size in this situation is n = 157. What are the degrees of freedom for constructing a confidence interval for, or performing a test about, the population slope?
A) 157
B) 156
C) 155
D) 153

Question

Use the following to answer the questions below:
Computer output from a regression analysis is provided.
The regression equation is Y = 72.9 - 0.519 X
 
-The sample size in this situation is n = 157. What are the degrees of freedom for constructing a confidence interval for, or performing a test about, the population slope?
A) 157 
B) 156 
C) 155 
D) 153

Quizplus · Accepted Answer

The degrees of freedom for a confidence interval or hypothesis test about the population slope in simple linear regression is n - 2, which is 157 - 2 = 155.

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