3-21

The following is a set of datafor a population with N=10;

7 5 11 8 3 6 2 1 9 8

a. compute the population mean

b. compute the population standard deviation

3-37

The following is a set of data from a sample of n=11 items

X 7 5 8 3 6 10 12 4 9 15 18

Y 21 15 24 9 18 30 36 12 27 45 54

a. Compute the covariance

b. Compute the coefficient of correlation

c. How strong is the relationship between X and Y? Explain.

Step by step method for computing descriptive statistics is given in the answer.