Use the following
Data were collected on the age (in years) and price (in thousands of dollars) of a random sample of 25 used Hyundai Elantras. A scatterplot of the data (with regression line) and computer output from a regression analysis are provided.
Use three decimal places when reporting the results from any calculations, unless otherwise specified.
The regression equation is Price = 15.3 - 1.71 Age

S = 1.37179 R-Sq = 88.9% R-Sq(adj) = 88.4%
Predicted Values for New Observations

-What are the degrees of freedom for constructing a confidence interval for, or performing a test about, the population slope?
A) 25
B) 24
C) 23
D) 22

Question

Use the following 
Data were collected on the age (in years) and price (in thousands of dollars) of a random sample of 25 used Hyundai Elantras. A scatterplot of the data (with regression line) and computer output from a regression analysis are provided.
Use three decimal places when reporting the results from any calculations, unless otherwise specified.
The regression equation is Price = 15.3 - 1.71 Age
  
S = 1.37179 R-Sq = 88.9% R-Sq(adj) = 88.4%
Predicted Values for New Observations

-What are the degrees of freedom for constructing a confidence interval for, or performing a test about, the population slope?
A) 25 
B) 24 
C) 23 
D) 22

Quizplus · Accepted Answer

The degrees of freedom for the population slope in a simple linear regression is calculated as n - 2, where n is the number of data points. If n = 25, then the degrees of freedom is 25 - 2 = 23.

Use the Following