Statistics (STAT 101) Simple Linear Regression: Confidence vs Prediction Intervals Practice Problems
University of Michigan
Statistics (STAT 101) | Practice Problems

Overview
Practice problems on regression questions students commonly miss: interpreting slope, and distinguishing confidence intervals for mean response from prediction intervals.

Key topics
•slope meaning in context
•residual and model assumptions
•confidence interval for mean response
•prediction interval for a new observation

Suggested study tasks
•interpret slope with correct units
•explain when to use CI vs PI
•answer a word problem choosing and interpreting the right interval

Common pitfalls
•using PI when the question asks about the mean
•ignoring model assumptions when making conclusions
•mixing up x and y roles in interpretation