E

Question 10

The claim is that smokers have a mean cotinine level greater than the level of 2.84 ng/ml found for nonsmokers. (Cotinine is used as a biomarker for exposure to nicotine.) The sample size is n = 835 and the test statistic is t= 52.655. Use technology to find the P-value. Based on the result, what is the final conclusion? Use a significance level of 0. 10. State the null and alternative hypotheses. Ho- H H1 H V (Type integers or decimals. Do not round.) The test statistic is (Round to two decimal places as needed.) The P-value is (Round to three decimal places as needed.) Based on the P-value, there sufficient evidence at a significance level of 0. 10 to the claim that smokers have a mean cotinine level greater than the level of 2.84 ng/ml found for nonsmokersWhen Brett Kavanaugh was nominated to be a Supreme Court justice, a survey of 1018 Americans showed that 51.3% of them disapproved of Kavanaugh. A newspaper published an article with this headline: "Majority of Americans Disapprove of Kavanaugh." Use a 0.10 significance level to test the claim made in that headline. Use the P-value method. Use the normal distribution as an approximation to the binomial distribution. Let p denote the population proportion of all Americans who disapproved of Kavanaugh. Identify the null and alternative hypotheses. Ho P Hy p (Type integers or decimals. Do not round.) Identify the test statistic. Z= (Round to two decimal places as needed.) Identify the P-value P-value = (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. the null hypothesis. There sufficient evidence to the claim that a majority of Americans disapproved of KavanaughA data set includes times (in minutes) of taxi cab rides in New York City yellow cabs during a Friday morning of the same day in a recent year. Using 39 of the times to test the claim that the mean of all such times is less than 15 minutes, the accompanying Minitab display is obtained. Test the given claim by using the display provided from Minitab. Use a 0.01 significance level. i Click the icon to view the Minitab display. Identify the null and alternative hypotheses. H (Type integers or decimals. Do not round.) Identify the test statistic. Round to two decimal places as needed.) Identify the P-value. (Round to three decimal places as needed.) State the conclusion about the null hypothesis, as well as the final conclusion that addresses the original claim. the null hypothesis. There sufficient evidence at the 0.01 significance level to the claim that the mean time of all taxi cab rides in New York City yellow cabs during the Friday morning is less than 15 minutesTrials 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 O B. Ho: P = 0.20 H1: p > 0.20 H1: p # 0.20 O C. Ho P= 0.80 O D. Ho: P = 0.80 Hj: p # 0.80 H,: p > 0.80 O E. Ho- P= 0.80 OF. Ho: P= 0.20 H1: p