On a recent quiz, the class mean was 73 with a standard deviation of 4. a)...

Question

Question

On a recent quiz, the class mean was 73 with a standard deviation of 4.

a) Calculate the z-score for a person who received score of 77.

b) Is this unusual?

math Statistics-And-Probability

Answer 1

Answer #1

Solution :

Given ,

mean = = 73

standard deviation = = 4

x=77

using z-score formula

z =X -/

z=77-73/4

z=1

z-score=1

it is usual

Answer 2

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