Suppose that a Normal model described student scores in a history class. Parker has a standardized score (z-score) of +2.5. This means that Parker
A) is 2.5 standard deviations above average for the class.
B) has a standard deviation of 2.5.
C) has a score that is 2.5 times the average for the class.
D) is 2.5 points above average for the class.
E) none of these

Question

Quizplus · Accepted Answer

A standardized score (z-score) measures how many standard deviations a data point is from the mean in a normal distribution. A z-score of +2.5 indicates that Parker's score is 2.5 standard deviations above the mean for the class.

Suppose That a Normal Model Described Student Scores in a History