What is the z-score of sample X, if n=100,mu=61,St.Dev.=43,and E[X]=98

proximumha 2022-08-12 Answered
What is the z-score of sample X, if n = 100 , μ = 61 , S t . D e v . = 43 , and E [ X ] = 98 ?
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Answers (1)

Emely English
Answered 2022-08-13 Author has 16 answers
The z-score for a sample mean is calculated by the formula
z = x ¯ - μ σ n
x ¯ = E ( x ) = 98
μ = 61
σ = 43
n = 100
Therefore, z = 98 - 61 43 100
= 37 4.3 = 8.6
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