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AP Statistics
Unit 9 – Slopes
Topic 9.3
What is the interpretation of a 90% confidence interval for the slope of a linear regression model?
We are 90% confident that the true slope lies within the interval
The interval contains 90% of the data points
There is a 90% probability that the slope is exactly equal to the midpoint of the interval
The interval represents a 90% reduction in the standard error of the slope
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AP Statistics - 9.3 Justifying a Claim About the Slope of a Regression Model Based on a Confidence Interval
Key terms
Linear Regression Model
Slope
90% Confidence Interval
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AP® and SAT® are trademarks registered by the College Board, which is not affiliated with, and does not endorse this website.
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