The arithmetic mean of a data set is 46 and the standard deviation of the set is 4. Which value is exactly 1.5 standard deviations from the arithmetic mean of the set?
看不懂问题,求助啊!!!!
术语知道的,就是最后那一问不懂啊?
最后那句的意思是: 以下哪个值与那组数的数学平均数相差1.5个标准方差
因为标准方差是4~
1.5个标准方差就是6了
也就是46 +or- 6
呵呵
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