9. A certain disease only affects men 20 years of age or older. The chart shows the probability that a man with the disease falls in the given age group. What is the probability that a randomly selected man with the disease is not between the ages of 55 and 64? Age Group Probability 20-24 0.004 25-34 0.006 9 35-44 0.14 45-54 0.29 55-64 0.32 65-74 0.17 75+ 0.07 A) 0.32 B) 0.24 C) 0.68 D) 0.29 10. If we reject the null hypothesis when the null hypothesis is true, then we have made a A) Type II error B) Type a error 10 C) Correct decision D) Type I error 1 1. The mean age of professors at a university is greater than 51.2 years. If a hypothesis test is performed, how should you interpret a decision that rejects the null hypothesis? 11 A) There is sufficient evidence to reject the claim u > 51.2. B) There is not sufficient evidence to reject the claim u > 51.2. C) There is not sufficient evidence to support the claim u > 51.2. D) There is sufficient evidence to support the claim u > 51.2. 12. Determine the critical value for a left-tailed test of a population mean at the a = 0.025 level of significance based on a sample size of n = 18 with unknowo. 12 A) -3.222 B) 2.101 C) -2.11 D) 2.110 13. Compute the standardized test statistic, X , to test the claim - = 21.5 ifn = 12, " = 18, and a= 0.05. 13 A) 0.492 B) 12.961 C) 18.490 D) 9.209 14. A test is an inferential procedure used to determine whether a frequency distribution follows a specific distribution. 14 A) x2 B) normality C) F D) goodness-of-fit 15. Which of the following is not true about the correlation coefficient r? A) It has no units B) It is always between -1 and 1 inclusive. C) r 21 D) It remains the same if x and y are interchanged 15 2Part I select the most appropriate answer (60 points total) 1. A travel industry researcher interviews all of the passengers on ve randomly selected ggiises, What sampling technique is used? 1. A) cluster B) stratified C) systematic D) convenience The average score of local students on a college entrance exam is l 10. with a standard deviation ofS. The distribution is roughly bell shaped. Use the Empirical Rule to find the percentage of local students with scores above 120. 2 2 A) 5% B) 2.5% C) 97.5% D) 95% Given the following five-number summary, nd the IQR. 2.9, 5.1 10.0, 13.2, 21.1. 3 A)7.5 B)7.1 C)18.2 D)11.l A highly selective boarding school will only admit students who place at least 1.5 z-scores above the mean on a standardized test that has a mean of 110 and a standard deviation of 12. What is the minimum score that an applicant must make on the test to be accepted? 4 A)92 B)93 (3)2128 mm In distributions that are skewed to the right, what is the relationship of the mean, median, and mode? 5 A} median > mean > mode B} mode > median > mean C) mode > mean > median D) mean > median > mode The probability that a house in an urban area will develop a leak is 5%. If 20 houses are randomly selected, what is the mean of the number of houses that developed leaks? 6 M15 B)2 (3)05 DH 2 Find the z-score having area 0.86 to its right under the standard normal curve; that is, find 0'86. 7 A} -l .08 B) 04555? C) 1.08 D}(1.8051 Find the W for a right-tailed test using 0'. = 0.01, degrees of freedom in the numerator = 3 and degrees of freedom in the denominator = 20. (Table H) 8 A) 3.09 B) 5.82 C) 4.94 D) 25.58