Question

Refer to the information given in Section 1.4 Exercises 23-24 of the text. Compute the z-scores for Marty (98, Ms. Cooper's class) and Lisa (96, Miss Hoover's class), and identify which one did relatively better on his/her test.

A) Marty, because his z-score is higher
B) Lisa, because her z-score is higher
C) They both did equally well
D) Cannot be determined from the information given

Answer 1

The z-scores for Marty and Lisa cannot be determined without knowing the mean and standard deviation of their respective classes.

Step-by-step explanation:

To compute the z-scores for Marty and Lisa, we need to know the mean and standard deviation of their respective classes. Without this information, it is not possible to determine who did relatively better on the test.

A z-score measures how many standard deviations a data point is from the mean. A positive z-score indicates a score above the mean, while a negative z-score indicates a score below the mean.

Therefore, the correct answer is D) Cannot be determined from the information given.