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
ANSWER: a
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