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The following table summarizes the results of an aptitude test given to six clerks to determine the correlation between test scores (x) and sales in the first month (y) in hundreds of dollars.

X254233542936
Y427250904548

1

Find the correlation coefficient and interpret the results.

2

Calculate the regression line of y on x and predict the sales of a vendor who obtains 47 on the test.

xiyixi ·yixi²y
25426251,7641,050
42721,7645,1843,024
33501,0892,5001,650
54902,9168,1004,860
29458412,0251,305
36481,2962,3041,728
2093478,53121,87713,617

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Emma

I am passionate about travelling and currently live and work in Paris. I like to spend my time reading, gardening, running, learning languages and exploring new places.

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