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3 cards from this section. Quick, good the night before a test.
What does it mean if Pearson's correlation coefficient r is 0?
Think about how two variables may relate to each other.
Where do the regression lines intersect?
Consider the average of both variables.
What does a correlation coefficient value of 0 imply?
Remember how r indicates relationships between variables.
Where do the two regression lines intersect?
Think of averages for both variables.
You have a dataset with r = 0.8. How would you interpret this in the context of a predictive model?
Think about relationship strength and prediction reliability.
Explain the potential consequences of using a regression model with r = 0 for forecasting sales.
Consider the implications of no correlation in sales trends.
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