1.2 - Key Concepts
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Practice Questions
Test your understanding with targeted questions
Define independent variable.
💡 Hint: Think about what you manipulate or measure in an experiment.
What is the regression line of y on x?
💡 Hint: Recall the role of predictor and outcome.
4 more questions available
Interactive Quizzes
Quick quizzes to reinforce your learning
What is the independent variable?
💡 Hint: 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.
💡 Hint: Think about perfect correlation.
1 more question available
Challenge Problems
Push your limits with advanced challenges
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.
💡 Hint: Make sure to compute each step carefully!
Explain how a change in the correlation coefficient affects the slope of the regression line.
💡 Hint: Consider how strong relationships influence predictions.
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Reference links
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