An instructor is preparing a report showing mid-semester grades and notes that the mean,median,and mode are all exactly 76.00.What can she conclude?
A)The distribution of grades is unskewed.
B)There is a negative skew in the distribution (a few students have very low grades. )
C)There is a positive skew in the distribution (a few students have very high grades).
D)all of the above

Question

Quizplus · Accepted Answer

If the mean, median, and mode are all exactly the same, it indicates a symmetrical distribution, which means there is no skewness in the distribution. Therefore, the best choice is A, which states that the distribution is unskewed. Choices B and C refer to skewness, which contradicts the fact that the mean, median, and mode are all the same.

An Instructor Is Preparing a Report Showing Mid-Semester Grades and Notes