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【OG20-P155-63题】
The table shows the numbers of packages shipped daily by each of five companies during a 4-day period. The standard deviation of the numbers of packages shipped daily during the period was greatest for which of the five companies?
分析A选项
分析B选项
分析C选项
分析D选项
分析E选项
比较五组数字的差值,离散程度最高的就是B
ElisaGo
standard deviation 标准差——反应离散程度(每项到平均值的距离之和) 目测BE离散程度较大 B 平均数20,四项都与之差10 E 平均数60,两项与之差10 所以选B
Jeaninla
离散率是看各个点离平均值的远近,而不是最大数和最小数之间的差距。
1289311ww
We see that the data points of Companies B and E are most spread apart. Thus, the largest standard deviation will come from either Company B or Company E. Let’s calculate the mean (arithmetic average) for Company B and E.
1289311ww
We may recall the the standard deviation represents how far the data points are from the mean.
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点击上传问题求解PS -16754
【OG20-P148-15题】Over the past 7 weeks, the Smith family had weekly grocery bills of $74, $69 ,$64, $79, $64, $84, and $77. What was the Smiths’ average(arithmetic mean) weekly grocery bill over the 7-week period?
问题求解PS -16747
【OG20-P163-114题】The table shows partial results of a survey in which consumers were asked to indicate which one of six promotional techniques most influenced their decision to buy a new food product .Of those consumers who indicated one of the four techniques listed ,what fraction i...
问题求解PS -16745
【OG20-P167-134题】10 ,4 ,26 ,16What is the median of the number shown ?
问题求解PS -16744
【OG20-P148-17题】During a recent storm ,9 neighborhoods experienced power failures of durations 34,29,27,46,18,25,12,35,and 16 minutes ,respectively .For these 9 neighborhoods ,what was the median duration ,in minutes ,of the power failures ?
问题求解PS -16740
【OG20-P146-3题】During a trip that they took together ,Carmen ,Juan ,Maria ,and Rafael drove an average (arithmetic mean )of 80 miles each. Carmen drove 72 miles ,Juan drove 78 miles ,and Maria drove 83 miles .How may miles did Rafael drive ?
问题求解PS -16754
【OG20-P148-15题】Over the past 7 weeks, the Smith family had weekly grocery bills of $74, $69 ,$64, $79, $64, $84, and $77. What was the Smiths’ average(arithmetic mean) weekly grocery bill over the 7-week period?
问题求解PS -16747
【OG20-P163-114题】The table shows partial results of a survey in which consumers were asked to indicate which one of six promotional techniques most influenced their decision to buy a new food product .Of those consumers who indicated one of the four techniques listed ,what fraction i...
问题求解PS -16745
【OG20-P167-134题】10 ,4 ,26 ,16What is the median of the number shown ?
问题求解PS -16744
【OG20-P148-17题】During a recent storm ,9 neighborhoods experienced power failures of durations 34,29,27,46,18,25,12,35,and 16 minutes ,respectively .For these 9 neighborhoods ,what was the median duration ,in minutes ,of the power failures ?
问题求解PS -16740
【OG20-P146-3题】During a trip that they took together ,Carmen ,Juan ,Maria ,and Rafael drove an average (arithmetic mean )of 80 miles each. Carmen drove 72 miles ,Juan drove 78 miles ,and Maria drove 83 miles .How may miles did Rafael drive ?