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Course: High school statistics?>?Unit 4
Lesson 2: Analyzing trend lines in scatterplots- Interpreting slope of regression line
- Interpreting y-intercept in regression model
- Interpreting slope and y-intercept for linear models
- Equations of trend lines: Phone data
- Example: Correlation coefficient intuition
- Correlation coefficient intuition
- Correlation and causality
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Interpreting slope and y-intercept for linear models
Problem
Julio distributed a survey to his fellow students asking them how many hours they spent playing sports in the past day. He also asked them to rate their mood on a scale from to , with being the happiest. Julio created the following scatterplot and regression line to show this relationship.
The fitted line has a -intercept of .
What is the best interpretation of this -intercept?