Bob's z-score for the last exam was -1.15 in FIN 417, "Capital Budgeting Strategies." Bob said, "Yipe! My score is within the bottom quartile." Assuming a normal distribution, is Bob right?
A)Yes
B)No
C)Must know the class size to answer

Question

Quizplus · Accepted Answer

If Bob's z-score is -1.15, it means his score was 1.15 standard deviations below the mean.

Assuming a normal distribution, we know that approximately 25% of the data falls within 1 standard deviation below the mean. Thus, Bob's score falls within the bottom quartile, and he's right in saying so.

Bob's Z-Score for the Last Exam Was -1