A sample of size n=48 is drawn from a population whose standard deviation is =23. Part 1 of 2 (a) Find the margin of error for a 95% confidence interval for u. Round the answer to at least three decimal places. The margin of error for a 95% confidence interval for u is 50 Part 2 of 2 (b) If the confidence level were 99%, would the margin of error be larger or smaller? because the confidence level is higher