Stander Capital Management are a hedge fund management company whose main fund has generated average returns of 13.5% over the last 30 years. The standard deviation of returns over that period is 18.9%

1.Calculate the confidence interval of the annual return on Stander's fund, at a 99% confidence level

2.Describe what is meant by a confidence interval constructed from a sample mean and standard deviation

3.Describe the impact on the width of a confidence interval if the sample size is decreased