Question 18 2 pts The heights of the adults in one town have a mean of 67.1 inches and a standard deviation of 3.5 inches. What can you conclude from Chebyshev's theorem about the percentage of adults in the town whose heights are between 60.1 and 74.1 inches? The percentage is at least 75% The percentage is at most 75% The percentage is at most 95% The percentage is at least 95% Question 17 3 pts The amount of Jen's monthly phone bill is normally distributed with a mean of $55 and a standard deviation of $12. What percentage of her phone bills are between $19 and $91? 68% 99.99% 99.7% 95% Question 16 2 pts The systolic blood pressure of 18-year-old women is normally distributed with a mean of 120 mmHg and a standard deviation of 12 mmHg. What percentage of 18-year-old women have a systolic blood pressure between 96 mmHg and 144 mmHg? 95% 99.7% 68% 99.99% Question 15 1 pts Find the IQR: The following is a set of data showing the water temperature in a heated tub at different time intervals. 114.7 113.5 116.7 113.7 115.5 115.1 112.8 113.3 1.3 1.9 0.9 1.0 Question 14 The heights in feet of people who work in an office are as follows. 5.8 5.9 6.1 5.4 6.0 5.8 5.9 6.2 5.7 5.8 (5.4, 5.8, 5.85, 6.0, 6.2} (5.4, 5.6, 5.65, 6.1, 6.2} (5.0, 5.8, 5.75, 6.0, 6.1} (5.1, 5.75, 5.8, 6.1, 6.2} 1 pts Question 13 2 pts When investigating times required for drive-through service, the following results (in seconds) were obtained. Restaurant A 120 67 89 97 124 68 72 96 Restaurant B 115 126 49 56 98 76 78 95 Restaurant A: 57 sec; 493.98; 22.23 sec Restaurant B: 77 sec; 727.98; 26.98 sec There is more variation in the times for restaurant B. Restaurant A: 57 sec; 793.98; 28.18 sec Restaurant B: 77 sec; 727.98; 26.98 sec There is more variation in the times for restaurant A. Restaurant A: 57 sec; 493.98; 22.23 sec Restaurant B: 56 sec; 727.98; 32.89 sec There is more variation in the times for restaurant B. Restaurant A: 75 sec; 493.98; 22.23 sec Restaurant B: 70 sec; 727.98; 26.98 sec There is more variation in the times for restaurant B. Question 12 To get the best deal on a CD player, Tom called eight appliance stores and asked the cost of a specific model. The prices he was quoted are listed below: $356 $169 $293 $267 $386 $288 $318 $275 $330.5 $65.1 $721,124.0 $691,488.0 1 pts Question 11 1 pts Christine is currently taking college astronomy. The instructor often gives quizzes. On the past seven quizzes, Christine got the following scores: 55 18 39 20 20 44 69 39 12,367 10,032.1 19.7 Question 10 1 pts To get the best deal on a microwave oven, Jeremy called six appliance stores and asked the cost of a specific model. The prices he was quoted are listed below: $663 $273 $410 $622 $174 $374 34,064.3 Dollars 36,838.2 Dollars 30,698.6 Dollars 1,207,582.7 Dollars Question 9 1 pts Rich Borne teaches Chemistry 101. Last week he gave his students a quiz. Their scores are listed below. 24 31 47 29 31 16 48 41 50 54 37 22 38 54 7 16 Question 8 2 pts A student earned grades of 84, 78, 84, and 72 on her four regular tests. She earned a grade of 78 on the final exam and 86 on her class projects. Her combined homework grade was 87. The four regular tests count for 40% of the final grade, the final exam counts for 30%, the project counts for 10%, and homework counts for 20%. What is her weighted mean grade? Round to one decimal place. 80.2 81.2 82.1 81.3 Question 7 2 pts Elaine gets quiz grades of 90, 83, and 64. She gets a 69 on her final exam. Find the weighted mean if the quizzes each count for 20% and the final exam counts for 40% of the final grade. Round to one decimal place. 75.0 74.0 79.2 76.5 Question 6 94 33 32 33 29 94 94, 33 33 52.5 24 94 1 pts Question 5 -20 -45 -46 -45-49 -45 -49 -49 - 45 -46 - 42.7 1 pts Question 4 1 pts A store manager kept track of the number of newspapers sold each week over a seven-week period. The results are shown below. 81 71 202 113 269 248 242 Find the median number of newspapers sold. 113 newspapers 202 newspapers 175 newspapers 242 newspapers Question 3 1 pts The temperatures (in degrees Fahrenheit) in 7 different cities on New Year's Day are listed below. 25 25 31 53 64 73 83 Find the median temperature. 31F 53F 64F 51F Question 2 Last year, nine employees of an electronics company retired. Their ages at retirement are listed below. Find the mean retirement age. 56 65 62 53 68 58 65 52 56 59.4 yr 58.0 yr 58.8 yr 58.2 yr 1 pts Question 1 1 pts Andrew asked seven of his friends how many cousins they had. The results are listed below. Find the mean number of cousins. 15 12 5 14 446 8.6 cousins 10 cousins 8.1 cousins 10.1 cousins