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Some account services available until you sign 7) The average score of local students on a college entrance exam is 110, with a standard deviation of 5. The distribution is roughly bell shaped. Use the Empirical Rule to find the percentage of local students with scores above 120. 8) For the following data, approximate the mean and standard deviation of the number of emails received per day. Emails (per day) Frequency 8 - 12 3 13 - 17 34 18 - 22 31 23 - 27 8 28 - 32 27 9) Test scores for a statistics class had a mean of 79 with a standard deviation of 4.5. Test scores for a calculus class had a mean of 69 with a standard deviation of 3.7. Suppose a student gets an 81 on the statistics test and a 73 on the calculus test. Calculate the z-score for each test. On which test did the student perform better relative to the other students in each class? 10) 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? 11) Health care issues are receiving much attention in both academic and political arenas. A sociologist recently conducted a survey of senior citizens whose net worth is too high to qualify for government health care but who have no private health insurance. The ages of 25 uninsured senior citizens were as follows: 71 76 69 79 89 77 64 92 68 93 72 95 79 65 84 66 71 84 73 76 63 90 78 67 85 Find the 5-number summary for this data