Mathematics
Anelrodriguez20
20

Betty scored 56 on a statistics test that had a mean of 65 and a standard deviation of 5. What was the Z- score on the test?

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(1) Answers
IndyGiselle

Z-score for a variable X is calculated using Z(x)=(x-mean)/standard deviation. Here x=56 mean=65 standard deviation=5 so  Z(65)=(65-56)/5=9/5=1.8

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