(1) Keep Confidence Level 90%.

For sample size n, choose a value for n between 4 and 10

For sample meanx,choose a value between 10 and 80

For sample standard deviation s, choose a value between 3 and 20

1. Use Appendix table IV and find t-value for your case;

2. Calculate Margin of Error;

3. Create Confidence Interval for Population Mean.

(2I) t is often difficult to find the exact mean (average) of a large population of data.We use confidence Intervals to estimate where we think the true mean lies.Discuss the advantages of using aconfidence interval. Give an example of a large population of data that is suited to a confidence interval estimate- in other words, it would be very hard to find the exact true mean of the data.