What is the z-score of sample X, if $n = 100, mu= 99, St. Dev. =43, and E[X] =95$ ?

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Answer 1 · 2016-05-01T00:52:47

$z=-0.9302325581$

The formula

$z=(x-mu)/((sigma/sqrt(n)))$

$z=(95-99)/((43/sqrt(100)))$

$z=-40/43=-0.9302325581$

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What is the z-score of sample X, if n = 100, mu= 99, St. Dev. =43, and E[X] =95n = 100, mu= 99, St. Dev. =43, and E[X] =95?