Inference for Regression questions For each of the following, explain what is wr
ID: 3356680 • Letter: I
Question
Inference for Regression questions
For each of the following, explain what is wrong and why.
a) The parameters of the simple linear regression model are b0, b1, and s.
b) To test H0: b1=0, use a t test
c) For a particular value of the explanatory variable x, the confidence interval for the mean response will be wider than the prediction interval for a future observation.
d) The slope describes the change in x for a change in y.
e) The population regression line is y=b0 + b1x
f) A 95% confidence interval for the mean response is the same width regarless of x.
Explanation / Answer
a) parameter of simple linear regression is just bo and b1
b) Everything is right
d) slope describes value of y if all x's are held constant.
e) sample regression line is y = bo +b1x