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Claim: Fewer than 90% of adults have a cell phone. In a reputable poll of 1177 adults, 85% said that they have a cell phone. Find the value of the test statistic. The value of the test statistic is . (Round to two decimal places as needed.) Assume a signicance level of or = 0.05 and use the given information to complete parts (a) and (b) below. Original claim: Less than 47% of adults would erase all of their personal information online if they could. The hypothesis test results in a P-value of 0.2968. a. State a conclusion about the null hypothesis. (Reject H0 or fail to reject Ho.) Choose the correct answer below. 0 A. Reject Ho because the Pvalue is less than or equal to a. O B. Fail to reject Ho because the Pvalue is less than or equal to (x. O c. Reject H0 because the P-value is greater than a. O D. Fail to reject H0 because the P-value is greater than or. b. Without using technical terms, state a nal conclusion that addresses the original claim. Which of the following is the correct conclusion? 0 A. The percentage of adults that would erase all of their personal information online if they could is less than 47%. O B. There is not sufcient evidence to support the claim that the percentage of adults that would erase all of their personal information online if they could is less than 47%. O C. There is sufcient evidence to support the claim that the percentage of adults that would erase all of their personal information online if they could is less than 47%. O D. The percentage of adults that would erase all of their personal information online if they could is more than or equal to 47%. Trials in an experiment with a polygraph include 99 results that include 23 cases of wrong results and 76 cases of correct results. Use a 0.05 significance level to test the claim that such polygraph results are correct less than 80% of the time. Identify the null hypothesis, alternative hypothesis, test statistic, P-value, conclusion about the null hypothesis, and final conclusion that addresses the original claim. Use the P-value method. Use the normal distribution as an approximation of the binomial distribution. Let p be the population proportion of correct polygraph results. Identify the null and alternative hypotheses. Choose the correct answer below. O A. Ho: P = 0.20 OB. Ho: P = 0.80 H,: p > 0.20 H,: p # 0.80 O C. Ho: p = 0.20 O D. Ho: P = 0.80 H1: p #0.20 H,: p > 0.80 OE. Ho: p = 0.80 OF. Ho: P = 0.20 H1: p