In Exercise 6.3.16 a 95% confidence interval of (93.8, 102.1) was given based on a sample of

Question:

In Exercise 6.3.16 a 95% confidence interval of (93.8, 102.1) was given based on a sample of n = 92 infants. Suppose, for sake of argument, that we could change the sample size and we would still get a sample mean of 97.95 and a sample SD of 20.04. How large would the sample size, n, need to be in order for the 95% confidence interval to exclude 100?