1. In the 2000 football season, 247 plays were reviewed by officials using instant video replays, and 83 of them resulted in reversal of the original call. In the 2001 football season, 258 plays were reviewed and 89 of them were reversed. Test the claim that the proportion of plays reversed is different for the 2000 and 2001 seasons.

a) State the null and alternative Hypotheses (H0 and H1).

b) Calculate the test statistic. 11 or 6

c) What is the critical value for ?

d) State your conclusion (reject H0 or fail to reject H0 )and explain your reasoning. Fail to reject H0

e) Is there a .05 significant difference in the two reversal rates? yes