| Date | May 2019 | Marks available | 1 | Reference code | 19M.1.SL.tz0.27 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Question number | 27 | Adapted from | N/A |
Question
What is coefficient of variation?
A. The ratio of the standard deviation to the mean expressed as a percentage
B. The sum of the standard deviation and the mean
C. The ratio of the mean to the standard deviation expressed as a percentage
D. The sum of the standard deviation subtracted from the mean
Markscheme
A
Examiners report
Mid-difficulty question with a strong discrimination index. Answer C was the main distractor.
