A) Find out a 99% confidence interval for the mean of µ of a normal population with standard deviation 30 using the sample: { 16.1, 19.2, 16.8, 16.2, 22.4, and 11.3}
B) By what factor does the length of the interval in change if we double the sample size?
C) How many samples would be needed for the length of the confidence interval to be equal to one?