Consider the following test scores from a typical high school class with 15 students: 81,83,91,99,100,89,92,96,89,94,83,90,98,89,97
MATHEMATICS
SAT 2021
Consider the following test scores from a typical high school class with 15 students: 81,83,91,99,100,89,92,96,89,94,83,90,98,89,97 The mean of this data set is_________, and the mode of this data set is _______.
- A. 81, 100
- B. 91.4, 100
- C. 91, 91.4
- D. 91.4, 89
Correct Answer: D. 91.4, 89
Explanation
The mean is just the average of all the test scores, which is found by adding up the scores and dividing by the number of scores (15). This gives 91.4 as the mean. The mode is the score which occurs most frequently. In this case, the mode is 89. The median, the middle score of the sequence, is 91.
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