Section B:

B.1.

The assignment marks for 11 students are:

9, 8, 5, 10, 8, 3, 4, 7, 8, 6, 7

a. Calculate the mean, median and mode

b. Calculate the first quartile, third quartile, and interquartile.

c. Calculate the sample standard deviation and interpret this value.

B.2.

A sample of 4 married couples were asked how happy each is in their own marriage.The ratings by these couples are:

Husband (X) Wife (Y)

2 7 8 3 1 6 7 2

a. Calculate the sample covariance and interpret the result.

b. Calculate the sample coefficient of correlation and interpret the result.

B.3.

A sample of 4 married couples were asked how happy each is in their own marriage.The ratings by these couples are:

Husband (X) Wife (Y)

6 7 8 3 5 6 7 2

a. Calculate the sample covariance and interpret the result.

b. Calculate the sample coefficient of correlation and interpret the result.