Scores on a test have a mean of 75 and a standard deviation of 8. Michelle...

Question

Question

Scores on a test have a mean of 75 and a standard deviation of 8. Michelle has a score of 91. Convert Michelle's score to a z-score.

Options:

A: -2

B: 2

C: -16

D: 16

math Statistics-And-Probability

Answer 1

Answer #1

X ~ N ( µ = 75 , σ = 8 )

Standardizing the value
Z = ( X - µ ) / σ
Z = ( 91 - 75 ) / 8
Z = 2

Option B is correct.

Answer 2

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