A researcher knows that a population standard deviation is = 3. She collects a sample of n = 50 who provide a sample mean of 14.20. She begins with the following hypotheses:

H0: = 15

H1: 15

What type of test will she use to test this hypothesis? ______________________________

For two-tailed test, = .05: significant or not significant

For one-tailed test, = .05: significant or not significant

For two-tailed test, = .10: significant or not significant

For one-tailed test, = .01: significant or not significant