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4 cards from this section. Quick, good the night before a test.
Define independent variable.
Think about what you manipulate or measure in an experiment.
What is the regression line of y on x?
Recall the role of predictor and outcome.
What is the independent variable?
Identify what you control in an experiment.
True or False: The regression line of y on x is the same as the regression line of x on y when correlation is perfect.
Think about perfect correlation.
Given the data for the number of hours studied and corresponding scores, find the regression line of y on x and use it to predict y when x = 10 hours.
Make sure to compute each step carefully!
Explain how a change in the correlation coefficient affects the slope of the regression line.
Consider how strong relationships influence predictions.
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