2025 · Q64
The scores of 16 students in a test are as follows: 19, 4, 17, 7, 15, 2, 18, 11, 15, 17, 19, 4, 3, 2, 6, 9. What is the difference between their arithmetic mean and the median?
General Mental Ability, Quantitative Aptitude and StatisticsStatistics
- A1.0
- B0.8
- C0.5
- D0.2
Explanation
The sum of the 16 scores is 168, so the mean is 168/16 = 10.5. Sorted, the scores are 2,2,3,4,4,6,7,9,11,15,15,17,17,18,19,19, and the median is the average of the 8th and 9th values: (9+11)/2 = 10. The difference between mean and median is 10.5 - 10 = 0.5.