What is the z-score of sample X, if n=169,mu=41,St.Dev.=39,and E[X]=43

Massatfy 2022-08-15 Answered
What is the z-score of sample X, if n = 169 , μ = 41 , S t . D e v . = 39 , and E [ X ] = 43 ?
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Answers (1)

Rowan Dyer
Answered 2022-08-16 Author has 14 answers
The z-score for a sample mean is
z = x ¯ - μ σ n
x ¯ = E [ X ] = 43
μ = 41
σ = 39
n = 169
Therefore,
z = 43 - 41 39 169
= 2 39 13
= 2 3
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