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(Solved by Expert Tutors) 6. Correlation 1 (15 points) Here is an interesting dataset: X ? ? ? Y


50 ? ?.25

100 ? .45

150. ? ,65

200 ?45

250 ?25

a) Make a scatterplot of Y versus X. (by-hand first, and then use Excel)

b) Describe the relationship between Y and X.

c) Find the correlation r between X and Y (by-hand first, and then use Excel).

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

 


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Apr 19, 2020

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