Find the Z-Score Corresponding to the Given Value and Use $- 22.8$

question 55

Short Answer

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 50.2 on a test having a mean of 73 and a standard deviation of 12. A) $- 22.8$ ; unusual
B) $- 1.9$ ; not unusual
C) -1.9; unusual
D) $1.9$ ; not unusual