52. What kind of hypothesis test will you use to analyze this dataset?

53. Using the .01 significance level, carry out a t test to test the experimenter's assumption that the participants' belief in the supernatural would change in some way after watching the movie.

What are the null and alternative hypotheses?

A.  

 

B.    

C.  

 

D.  

 

E.  

Identify the null hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. A simple random sample of front-seat occupants invol ved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 were killed. We want to use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Test the claim using a hypothesis test.

Identify thenull hypothesis, alternative hypothesis, test statistic, P-value or critical value(s), then state the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. A simple random sample of front-seat occupants invol ved in car crashes is obtained. Among 2823 occupants not wearing seat belts, 31 were killed. Among 7765 occupants wearing seat belts, 16 were killed. We want to use a 0.05 significance level to test the claim that seat belts are effective in reducing fatalities. Test the claim by constructing an appropriate confidence interval.