7. Using the Z Chart or excel, assume normal distribution, What is the Probability if Z...

7. Using the Z Chart or excel, assume normal distribution, What is the Probability if Z = -2.09? What is Z if the probability is 0.39?

8. Why would a person use Z scores to compare performance in Business and History classes?

Expert Solution

8)

Why would a person use Z scores to compare performance in Business and History classes?

If we know the values of mean & std deviation then we cannot directly compare the means without considering variance or we cannot compare variance without considering mean.

To compare using both mean and variance we use z score.

So we get an estimate that we can compare with the other is z score.

Z = x - mean / std deviation.

it is a precise measure for comparison of different groups

orchestra answered 1 year ago

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