Find the z-score corresponding to the given value and use the z-score to determine whether the value is unusual.
Consider a score to be unusual if its z-score is less than -2.00 or greater than 2.00. Round the z-score to the nearest tenth
if necessary.
-A test score of 48.4 on a test having a mean of 66 and a standard deviation of 11.
A) -1.6; unusual
B) -17.6; unusual
C) 1.6; not unusual
D) -1.6; not unusual

Question

Quizplus · Accepted Answer

The z-score is calculated as (48.4 - 66) / 11 = -1.6. Since -1.6 is not less than -2.00, the score is not considered unusual.

Find the Z-Score Corresponding to the Given Value and Use