What is the z-score of sample X, if n=169, mu=33,St.Dev.=39,and E[X]=37

ljudskija7s

ljudskija7s

Answered question

2022-08-14

What is the z-score of sample X, if n = 169 , μ = 33 , S t . D e v . = 39 , and E [ X ] = 37 ?

Answer & Explanation

Kaitlynn Church

Kaitlynn Church

Beginner2022-08-15Added 19 answers

The z-score of a sample mean is
z = x ¯ - μ σ n
Here,
x ¯ = E [ X ] = 37
μ = 33
σ = 39
n = 169
z = 37 - 33 39 169
= 4 39 13 = 4 3 = 1.33

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