How to Calculate the Mean, Median, Mode, and Range

Feedback: Not quite! To find the mean, add all the scores and divide by the number of scores: (3 + 5 + 9 + 5 + 8) ÷ 5 = 30 ÷ 5 = 6.

Feedback: Not quite! The range is found by subtracting the smallest value from the largest value: 10 - 3 = 7.

Feedback: Not quite! The mode is the value that occurs most often. Here, 7 appears three times, so it’s the mode.

Feedback: Not quite! First, sort the scores: 3, 5, 6, 8, 8, 10. Since there are an even number of scores, the median is the average of the two middle values: $(6+8)÷2=7$.

Feedback: Not quite! After removing 6, the scores are: 9, 7, 10, 7, 7, 8. Now sort them: 7, 7, 7, 8, 9, 10. There are 6 scores, which is an even number, so we take the average of the two middle values. The median is $(7+8)÷2=7.5$.

Feedback: Not quite! The new scores are: 5, 6, 7, 7, 8, 9, 100. The mean increases because the total score increases significantly. The middle value remains 7. The mode stays the same, as 7 is still the most frequent value.