Question

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Exam scores were distributed normally with a mean of 72 and a standard deviation of 3.
What is the z score (standard score) for an exam score of 77?

Answer 1

1.67

Explanation:

We can use the formula:

z = (x - μ) / σ

where:

x = the exam score

μ = the mean

σ = the standard deviation

Plugging in the values we get:

z = (77 - 72) / 3

z = 1.67

Therefore, the z-score for an exam score of 77 is 1.67