A Bank wishes to determine the mean income of its credit card holders and more

specifically wants to investigate whether there are any differences in the mean income

between males and females. Confidence interval as a statistical inference method has

been considered to respond this objective.

You are required to

1. Comment on the choice of confidence intervals as a statistical inference method for

the above.

2. Describe how you will proceed to determine the corresponding confidence intervals.

3. Explain how you would use confidence intervals as evidence suggesting that in

average males and females income differ.

Use Numerical examples to illustrate as and when required.