STAT 200 Final Exam (FALL 2016) STAT 200 Final Exam 2016 | Page 9

Assume we want to use a 0.05 significance level to test the claim.
(a) Identify the null hypothesis and the alternative hypothesis.
(b) Determine the test statistic. Show all work
(c) Determine the p-value. Show all work
(d) Is there sufficient evident to support the claim that regular exercise helps weight loss?
Justify your conclusion.
18. In a pulse rate research, a simple random sample of 50 men results in a mean of 80
beats per minute, and a standard deviation of 11.5 beats per minute. Based on the sample
results, the
researcher concludes that the pulse rates of men have a standard deviation greater than 10
beats per minutes. Use a 0.10 significance level to test the researcher’s claim.
(a) Identify the null hypothesis and alternative hypothesis.
(b) Determine the test statistic. Show all work
(c) Determine the P-value for this test. Show all work(d) Is there sufficient evidence to
support the researcher’s claim? Explain.
19. The UMUC MiniMart sells five different types of Halloween candy bags. The manager
reports
that the five types are equally popular. Suppose that a sample of 500 purchases yields
observed