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In a population of chickens, the average (arithmetic mean) weight is 6.3 pounds, and the standard deviation is 1.2 pounds. Which of the following weights (in pounds) are within 1.5 units of standard deviation of the mean? 

Indicate all weights.

正确答案: BCDEFG 耗时:
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  • 当前版本由huan~更新于2019-03-28 15:18:23 感谢由huan~对此题目的解答所做出的贡献。

    1.5个单位标准差是:1.5*1.2=1.8

    6.3-1.8=4.5,6.3+1.8=8.1

    所以在4.5-8.1区间的都符合

题目讨论 (如果对题目有任何的疑惑,欢迎在这里提出来,大家会帮你解答的哦~)

Wasp Max

-How std works: -1 std unit is 1.2lbs so how much would be 1.5 units? -1.5 = 1 + 0.5. 1= 1.2 so half is 0.6 so 1.5 would be 1.2+0.6=1.8 -Rest is easy to solve
7楼  | 2019-07-12 19:46:38 回复

Wasp Max

-How std works: -1 std unit is 1.2lbs so how much would be 1.5 units? -1.5 = 1 + 0.5. 1= 1.2 so half is 0.6 so 1.5 would be 1.2+0.6=1.8 -Rest is easy to solve
6楼  | 2019-07-12 19:46:38 回复

Wasp Max

-How std works: -1 std unit is 1.2lbs so how much would be 1.5 units? -1.5 = 1 + 0.5. 1= 1.2 so half is 0.6 so 1.5 would be 1.2+0.6=1.8 -Rest is easy to solve
5楼  | 2019-07-12 19:46:38 回复

Wasp Max

-How std works: -1 std unit is 1.2lbs so how much would be 1.5 units? -1.5 = 1 + 0.5. 1= 1.2 so half is 0.6 so 1.5 would be 1.2+0.6=1.8 -Rest is easy to solve
4楼  | 2019-07-12 19:46:38 回复

Wasp Max

-How std works: -1 std unit is 1.2lbs so how much would be 1.5 units? -1.5 = 1 + 0.5. 1= 1.2 so half is 0.6 so 1.5 would be 1.2+0.6=1.8 -Rest is easy to solve
3楼  | 2019-07-12 19:46:38 回复
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