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Tem Rousos, president of Rousos Ford, believes there is a relationship between the number of new cars sold and the number of sales people on duty. To investigate he selects a sample of eight weeks and determines the number of new cars sold and the number of sales people on duty for that week.

Week Sales staff Cars sold
1 5 53
2 5 47
3 7 48
4 4 50
5 10 58
6 12 62
7 3 45
8 11 60

a. Plot these data in a scatter diagram.
b. Determine the coefficient of correlation.
c. Determine the coefficient of determination. Comment on the strength of the association between the two variables.

https://brainmass.com/statistics/regression-analysis/regression-analysis-237104

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Week Sales staff Cars sold
1 5 53
2 5 47
3 7 48
4 4 50
5 10 58
6 12 62
7 3 45
8 11 60

a. Plot these data in a scatter diagram. ...

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