e
因為u=(95-90)/(28/√49)=1.25,查表得P=0.056 .
問一道統(tǒng)計學問題:英文
問一道統(tǒng)計學問題:英文
Suppose a population has a mean of 90 and a standard deviation of 28.If a random sample of size 49 is drawn from the population,the probability of
drawing a sample with a mean of more than 95 is _________ .
Select one:
a.0.3944
b.1.0000
c.0.8944
d.0.4286
e.0.1056
我總覺得是a,但是不是應該X2的嗎?為什么?
Suppose a population has a mean of 90 and a standard deviation of 28.If a random sample of size 49 is drawn from the population,the probability of
drawing a sample with a mean of more than 95 is _________ .
Select one:
a.0.3944
b.1.0000
c.0.8944
d.0.4286
e.0.1056
我總覺得是a,但是不是應該X2的嗎?為什么?
英語人氣:603 ℃時間:2020-03-29 05:15:49
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