1. MULTIPLE CHOICE (choose 1 answer from the 5 choices below):

A simple random sample of 100 people is selected from a population that has a true standard deviation of 2 years. Thus, the standard error of the sample mean is .2, when n = 100. If the sample size of n = 400 had been used instead, the standard error of the sample mean would be:

• a) Twice as large as when n = 100
• b) Four times as large as when n = 100
• c) One-half as large as when n = 100
• d) One-fourth as large as when n = 100
• e) None of the above