5272道题目5525 条题源记录 · 相同内容已合并
均值・中位数与集中趋势进阶
A survey of the daily commuting times, in minutes, of seven different Chicago-based employees at a certain company yielded a data set consisting of the values 31, 13, 44, 32, 53, 22, and 44. A survey of the daily commuting times, in minutes, of seven different San Francisco-based employees at the same company yielded a data set consisting of the values 46, 31, 19, 33, 48, x, and 38. If the means of the two data sets are equal, what is the value of x?
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均值・中位数与集中趋势挑战
Ari examined a set of 86 plants. The lightest plant had a mass of 2.8 kilograms (kg) and the heaviest plant had a mass of 6.3 kg. Chihiro examined the same set of 86 plants and also an additional plant with a mass of 11.6 kg. Which of the following must be true about the set of plants that Ari examined and the set of plants that Chihiro examined?
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均值・中位数与集中趋势进阶
The table shows the amount of time it took a participant in a study to complete each of 5 tasks. What was the mean time, in minutes, for this participant to complete a task?
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均值・中位数与集中趋势进阶
A list of 10 data values is shown.
10, 14, 22, 6, 24, 26, 14, 8, 8, 8
What is the mean of these data?
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均值・中位数与集中趋势挑战
A data set of the orbital periods, rounded to the nearest whole number of Earth days, for 13 of Jupiter’s moons is represented in the dot plot. An additional moon with an orbital period of 251 days is added to the original data set to create a new data set of 14 orbital periods. Which statement best compares the mean and median of the new data set to the mean and median of the original data set?
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均值・中位数与集中趋势进阶
12, 22, 24, 33, 39, 42, 44
The given list shows the 7 values in a data set. Which of the following data sets has the same median as the given list?
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均值・中位数与集中趋势挑战
At a nature preserve, a wildlife biologist counted ducks from an observation deck at the same time each day for 41 days. The table summarizes the resulting data set, data set A.
The data value 13 was recorded in error and is removed from data set A to create data set B, which consists of the remaining 40 data values. Which statement best compares the median of data set A and the median of data set B?
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均值・中位数与集中趋势挑战
Each of the following frequency tables represents a data set. Which data set has the greatest mean?
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均值・中位数与集中趋势挑战
At a nature preserve, a wildlife biologist counted bald eagles from an observation deck at the same time each day for 21 days. The table summarizes the resulting data set, data set A.
The data value 19 was recorded in error and is removed from data set A to create data set B, which consists of the remaining 20 data values. Which statement best compares the median of data set A and the median of data set B?
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均值・中位数与集中趋势进阶
For a study, a research team measured the heights of 380 king penguins from the Kerguelen Islands and 190 king penguins from the Falkland Islands. The research team determined that the mean height of the 380 king penguins from the Kerguelen Islands was 87 centimeters and the mean height of the 190 king penguins from the Falkland Islands was 93 centimeters. What was the mean height, in centimeters, of all 570 king penguins the research team measured for this study?
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均值・中位数与集中趋势进阶
a, 26, 29, b, 31, 47, c
For the given data set, the data values are listed in ascending order, where a, b, and c are constants. For this data set, the mean is 36, the median is 29, and the range is 72. What is the value of c?
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均值・中位数与集中趋势挑战
For data set A, the table summarizes the distribution of the number of pieces of mail received by a business each day during a period of 11 days.
The data value 13 is removed from data set A to create data set B, which consists of the remaining 10 data values. Which statement best compares the median of data set A and the median of data set B?
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