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2 cards from this section. Quick, good the night before a test.
What is the formula for linear regression?
Remember what each letter stands for.
In the equation y = a + bx, what does 'y' represent?
Think about what you are trying to predict.
What does the slope 'b' indicate in a linear regression model?
Consider what the slope tells you about the line's steepness.
True or False: Linear regression can only be used for two variables.
Think about how regression models can expand.
A dataset contains the following points: (1, 2), (2, 3), (3, 5), (4, 7). Calculate the slope and intercept of the best-fit line.
Remember to compute means first for the dataset!
In a study of temperature and ice cream sales, how could you set up the linear regression model? What would your independent and dependent variables be?
Think about what affects what in this scenario.
5 more questions in this section. Enroll free to practise them all.
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