describe -Construct a 95% confidence interval for population mean
describe the mean return for a random sample of 33 mutual funds is 14.93 percent with a standard deviation of 9.57. Construct a 95% confidence interval for mu and the population mean.
1) 11.53 to 18.32
2) 11.01 to 18.85
3) 14.82 to 15.04
4) 10.95 to 18.91