Suppose You Plan to Build a 98% Confidence Interval Estimate

Multiple Choice

Suppose you plan to build a 98% confidence interval estimate of a population mean, using a sample of size 121.You will be estimating the population standard deviation with the sample standard deviation.The appropriate t-value for your interval would be ____ which you could approximate with a z score of _______ from the normal table.

A) 2.358, 2.33
B) 1.289, 2.33
C) 1.658, 1.96
D) 1.980, 1.96
E) 2.617, 2.33