Suppose the grades in a statistics class follow a normal distribution with a mean of 75 and a standard deviation of 8. What is the z-score for a grade of 85?

Question

Accepted Answer

Step:1 ：Step 1: To find the z-score, we need to use the formula ( Z = frac{X - mu}{sigma} ), where ( X ) is the value we are interested in, ( mu ) is the mean, and ( sigma ) is the standard deviation.Step:2 ：Step 2: Substituting the given values into the formula, we get ( Z = frac{85 - 75}{8} ).Step:3 ：Step 3: Simplify the expression to get the z-score.

Answer

Step: 1 ：Step 1: To find the z-score, we need to use the formula ( Z = frac{X - mu}{sigma} ), where ( X ) is the value we are interested in, ( mu ) is the mean, and ( sigma ) is the standard deviation.Step: 2 ：Step 2: Substituting the given values into the formula, we get ( Z = frac{85 - 75}{8} ).Step: 3 ：Step 3: Simplify the expression to get the z-score.

Suppose the grades in a statistics class follow a normal distribution with a mean of 75 and a standard deviation of 8. What is the z-score for a grade of 85?

Answer

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