Author Question: How does a confidence interval differ from a prediction interval? A) Confidence intervals are ... (Read 87 times)

kamilo84 · **on:** Jul 24, 2018

How does a confidence interval differ from a prediction interval?

A) Confidence intervals are used to measure the accuracy of the mean response of all the individuals in the
population, while a prediction interval is used to measure the accuracy of a single individuals predicted
value.
B) Confidence intervals are used to measure the accuracy of a single individuals predicted value, while a
prediction interval is used to measure the accuracy of the mean response of all the individuals in the
population.
C) Confidence intervals are constructed about the predicted values of y while prediction intervals a
constructed about a particular value of x
D) Confidence intervals are constructed about the predicted values of x while prediction intervals a
constructed about a particular value of y

Question 2

One of the requirements for conducting inference on the least-squares regression model is that the

A) mean of the response variable changes at a constant rate while the standard deviation remains constant.
B) mean of the explanatory variable changes at a constant rate while the standard deviation remains
constant.
C) mean of the response variable remains constant while the standard deviation changes at a constant rate.
D) mean of the explanatory variable remains constant while the standard deviation changes at a constant
rate.