What is the z-score of sample X, if n=169, mu=42,St.Dev.=39,and E[X]=12

Sincere Garcia 2022-09-29 Answered
What is the z-score of sample X, if n = 169 , μ = 42 , S t . D e v . = 39 , and E [ X ] = 12 ?
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Answered 2022-09-30 Author has 10 answers
The z-score for a sample mean is x ¯ - μ σ n
So, here we have = 12 - 42 39 169
= - 30 3 = - 10
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