Choose the correct response. 15) What should be your response to 737 respondents to a USA Today poll question on its Web site in which 92% said they do not open unfamiliar email or instant message links? Use a 0.01 signicance level to test the claim that more than75% of us do not open unfamiliar messages. a. Since the test statistic (an13 of 10.65 is greater than the critical value of 2.33 we would reject the null hypothesis and fully support the claim that more than 75% don't open unfamiliar messages. b. Since the results are based on a voluntary response sample. the results are not necessarily valid and should not be relied upon. c. A signicance level of 0.01 is excessive for simply measuring validity of opinions. The more appropriate signicance level of 0.05 would have resulted in a proper assessment of this problem. d. We would fail to reject the null hypothesis and concluded that 75% of us don't open unfamiliar emails or instant messages. 16) When testing a hypothesis. the hypothesis that is assumed to be true is a. the alternative hypothesis. b. neither the null or the alternative until the evidence supports one or the other. c. the null or the alternative. d. the null hypothesis