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试卷名称:GRE（QUANTITATIVE）综合模拟试卷12

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The numbers of passengers on 9 airline flights were 22, 33, 21, 28, 22, 31, 44, 50, and 19. The standard deviation of these 9 numbers is approximately equal to 10.2. (a)Find the mean, median, mode, range, and interquartile range of the 9 numbers. (b)If each flight had had 3 times as many passengers, what would have been the mean, median, mode, range, interquartile range, and standard deviation of the 9 numbers? (c)If each flight had had 2 fewer passengers, what would have been the interquartile range and standard deviation of the 9 numbers?

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The numbers of passengers on 9 airline flights were 22, 33, 21, 28, 22, 31, 44, 50, and 19. The standard deviation of these 9 numbers is approximately equal to 10.2. (a)Find the mean, median, mode, range, and interquartile range of the 9 numbers. (b)If each flight had had 3 times as many passengers, what would have been the mean, median, mode, range, interquartile range, and standard deviation of the 9 numbers? (c)If each flight had had 2 fewer passengers, what would have been the interquartile range and standard deviation of the 9 numbers?

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The daily temperatures, in degrees Fahrenheit, for 10 days in May were 61, 62, 65, 65, 65, 68, 74, 74, 75, and 77. (a)Find the mean, median, mode, and range of the temperatures. (b)If each day had been 7 degrees warmer, what would have been the mean, median, mode, and range of those 10 temperatures?

The figure below shows two concentric circles, each with center O. Given that the larger circle has radius 12 and the smaller circle has radius 7, find the following. (a)Circumference of the larger circle (b)Area of the smaller circle (c)Area of the shaded region [*]

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