A teacher records the test scores for the 40 students in her class. Corresponding to each score, she calculates a z-score. Julia's z-score is -2.8. Should she be concerned? Explain your reasoning.

Question

Quizplus · Accepted Answer

The Answer is Yes. Almost all z-scores lie between -3 and 3 so a z-score of -2.8 indicates that Julia's test score was lower than almost all of the other scores.

A Teacher Records the Test Scores for the 40 Students