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Homework: Assignment 7 Question 9, 7.1.3 HW Score: 11.74%, 1.29 of 11 points Points: 0 of 1 Your company's human resources department administers a test of "Executive Aptitude." They report test grades as z-scores, and you got a score of - 0.87. What does this mean? Choose the correct answer below. O A. You scored 0.87 points below the mean. O B. You scored 0.87 standard deviations above the mean. O C. You scored 0.87 standard deviations below the mean O D. You scored 0.87 points above the mean. = Homework Assignment 7 Question 10, 7.1.1 HW Score: 11.74%, 1.29 of 11 points Points: 0 of 1 Save An incoming MBA student took placement exams in economies and mathematics. In economies. she scored 82 and in math 80. The overall results on the economics exam had a mean of 70 and a standard deviation of 10. while the meen math score was 06. with a standard deviation of 13 On which exam did she do better compared with the other students? Since she scored ]standard deviations v the mean in acomomics and |]standard deviations | the mean in mathematics, she did better on the exam. (Round to two decimal places as needed.) mathematics economics Homework Assignment 7 Question 11, 7.CE.24 HW Score: 11.74%, 1.29 of 11 points Part 1 of 4 Points: 0 of 1 g Save For the following problem, use the 80-06-90.7 Rule to approximate the probability rather than using technology to find the values more precisely. Although controversial and the subject of some recent law suits, some human resource departments administer standard IQ tests to all am a applicant pool is well modeled by this distribution, a randomly selected applicant would have what probability of scoring in the following regions? 2) 86 or below b) Below 100 C) Between 58 and 142 d) Above 128 #) The probability is (Type an integer or a decimal. Do not round.) Homework: Assignment 7 Question 8, 7.CE.33-T HW Score: 11.74%, 1.29 of 11 points Part 1 of 4 Points: 0 of 1 The quarterly returns for a group of 60 mutual funds with a mean of 2.3%% and a standard deviation of 6.0%% can be modeled by a Normal model Based on the model N(0.023,0.080), what are the cutoff values for the ") highest 20% of these funds? b) lowest 10%? c) middle 40% ? d) highest 90% ? a) Select the correct choice and fill in any answer boxes in your choice below. (Round to two decimal places as needed.) OB X4 O c. x5