This pack of MATH 221 Week 7 DQ Rejection Region comprehends:

1. A study claims that the mean survival time for certain cancer patients treated immediately with chemotherapy and radiation is 16 months.

STUDY PLAN: 7.1.29, 7.1.30

OBJECTIVE: TEST A CLAIM ABOUT A MEAN USING CRITICAL VALUES

2. A company that makes colas drinks states that the mean caffeine content per 12-ounce bottle of cola is 45 milligrams. You want to test this claim. During your tests, you find that a random sample of thirty 12-ounce bottles of cola has a mean caffeine content of 43.3 milligrams with a standard deviation of 6.8 milligrams. At alpha = 0.05, can you reject the company