A student scored 89 points on a test where the mean score was 83 and the standard deviation was 3.The student's z-score was
A)27.67
B)29.67
C)0.67
D) 2.00

Question

Quizplus · Accepted Answer

We can use the formula for finding the z-score:
z = (x - μ) / σ

where x is the student's score (89), μ is the mean score (83), and σ is the standard deviation (3).

Using the formula, we get:
z = (89 - 83) / 3
z = 2

So the student's z-score is 2. Answer choice D is correct. Z-score formula: z = (x - μ) / σ

z = (89 - 83) / 3
z = 2

Therefore, the correct choice is D.

A Student Scored 89 Points on a Test Where the Mean