Question: Strong association but no correlation. Here is a data set that illustrates an important point about correlation: (a) Make a scatterplot of y versus x.

Strong association but no correlation. Here is a data set that illustrates an important point about correlation:x 20 30 40 50 60 y 10 30 50 30 10

(a) Make a scatterplot of y versus x.

(b) Describe the relationship between y and x. Is it weak or strong? Is it linear?

(c) Find the correlation between y and x.

(d) What important point about correlation does this exercise illustrate?

x 20 30 40 50 60 y 10 30 50 30 10

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