| Date | November 2017 | Marks available | 1 | Reference code | 17N.1.SL.tz0.28 |
| Level | Standard Level | Paper | Paper 1 | Time zone | time zone 0 |
| Command term | Which | Question number | 28 | Adapted from | N/A |
Question
Which is the equation for coefficient of variation?
A. Coefficient of variation = standard deviation − mean
B. Coefficient of variation = standard deviation ÷ mean × 100 %
C. Coefficient of variation = mean − standard deviation
D. Coefficient of variation = mean ÷ standard deviation × 100 %
Markscheme
B
Examiners report
The 4th most difficult question on the paper with a good discrimination index. D as the main distractor. It is important to recognize that the understanding of the statistics questions is tested on Paper 1 due to their significance in data analysis during Internal Assessments.
