What is the z-score of sample X, if n=64,mu=56,SD=20,and E[X]=320

Samson Kaufman

Samson Kaufman

Answered question

2022-08-10

What is the z-score of sample X, if n = 64 , μ = 56 , S D = 20 , and E [ X ] = 320 ?

Answer & Explanation

Royce Golden

Royce Golden

Beginner2022-08-11Added 12 answers

There are 64 observations. The Total of the 64 observations cannot be ( x ) = 320
Any the steps involved are -
( x ) = 320
x ¯ = ( x ) n = 320 64 = 5
S E = σ n = 20 64 = 20 8 = 2.5
z = x ¯ - μ S E = 5 - 56 2.5 = - 20.4
This answer may be wrong because of wrong information.

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