What is the z-score of sample X, if n=9,mu=56,SD=30,and E[X]=32

suchonosdy

suchonosdy

Answered question

2022-07-23

What is the z-score of sample X, if n = 9 , μ = 56 , S D = 30 , and E [ X ] = 32 ?

Answer & Explanation

minotaurafe

minotaurafe

Beginner2022-07-24Added 22 answers

The z-score for a sample mean is
z = x ¯ - μ σ 9
x ¯ = E [ X ] = 32
μ = 56
σ = 30
n = 9
Therefore,
z = 32 - 56 30 9 = - 24 10 = - 2.4

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