(r) Now repeat the analysis to test the research conjecture that that the average amount of sleep by all students at your school on a typical night differs from 7 hours.
Make sure you:
- Define the parameter of interest in words.
- State null and alternative hypotheses in symbols and in words.
- Use Minitab or the Test of Significance Calculator applet to change the hypothesized value.
- Include output for the test of significance.
- State your decision: reject or fail to reject the null hypothesis.
(s) Now reconsider your confidence interval for the population mean from before (question u). Based on this interval, could you have predicted how this test of significance would have turned out? Explain.
(t) What does the confidence interval tell you about how students at your school compare to the website's claim in the pre-lab that college students average 6-6.9 hours of sleep a night?
