What is the z-score of sample X, if n=256,mu=42,St Dev=80,and mu_X=89

Marcelo Maxwell 2022-09-27 Answered
What is the z-score of sample X, if n = 256 ,   μ = 42 ,   St.Dev = 80 ,   μ X = 89?
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Answers (1)

Cremolinoer
Answered 2022-09-28 Author has 11 answers
Given
n = 256 μ = 42 St.Dev = 80 μ X = 89
Find the Standard Error
S E = σ n = 80 256 = 5
Find the z-score
z = 89 42 5 = 9.4
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