1. Given n=30, x =60, s=3, 99% confidence. Assuming that the samples come from a normal distribution, find the interval estimate of the population mean.

Select one:

a. (60.09, 63.89)

b. (57.42, 62.58)

c. (58.59, 61.41)

d. (59.32, 64.68)

2. Find the sample size given 95% confidence, Margin of Error = 0.05 and p=0.15.