1 What has to be true about the shape of a relationship in order to start talking about a correlation?
2 What is the difference between a weak relationship and a negative relationship?
3 What is the difference between a strong relationship and a positive relationship?
4 If we find a strong relationship in a sample from a larger population, will that relationship always hold for the whole population? Why or why not?
5 A news report claims that after surveying 10 million people, a positive correlation was found between how much chocolate a person eats and how happy they are. Does this mean eating chocolate almost certainly makes you happier? Why or why not?
These materials were developed partly through support of the National Science Foundation,
(awards 1042210, 1535276, 1648684, and 1738598). 
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