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Question: What affects correlation? Here are some hypothetical data:

x:      1       2       3        4       10        10

y:      1       3       3        5       1         11

(a) Make a scatterplot to show the relationship between x and y.

(b) Calculate the correlation for these data by hand or using technology.

(c) What is responsible for reducing the correlation to the value in part (b) despite a strong straight-line relationship between x and y in most of the observations?

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