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4 cards from this section. Quick, good the night before a test.
What is correlation?
Think about how two things can change together.
Name the three types of correlation.
Consider the direction of change of the variables.
What does a correlation coefficient of 0 represent?
Consider what zero implies in relationships.
True or False: A positive correlation means that as one variable increases, the other variable must also increase.
Think about the definition of positive correlation.
You collected data on the hours spent studying and the scores achieved in an exam. The correlation coefficient turns out to be 0.95. How would you describe the strength and type of correlation?
Consider the closeness to 1.
In a research study, it's found that increased temperature correlates with decreased sales of hot cocoa. If you were to summarize this finding, how would you express it in terms of correlation type?
Think about how the two variables affect each other.
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