Since we don't know the population standard deviation we should use the t-distribution. For a sample size n=101, we have 100 (n-1) degrees of freedom. For the 98% confidence interval, we have alpha = 0.01. So the critical t is given by:
t = t.inv(p=0.99, df = 100) = 2.364
Mar 10th, 2015
Studypool's Notebank makes it easy to buy and sell old notes, study guides, reviews, etc.