Statisticshard · Past Paper
If the mean of a data set is 10 and the coefficient of variation is 20%, what is the standard deviation?
A2
B5
C10
D20
✓ Correct Answer: A — 2
CV = (SD / Mean) * 100. 20 = (SD / 10) * 100 => 2 = SD.
Share this question
More from Statistics
- What is the mean of first 10 multiples of 5?
- What is the probability of picking a non-vowel from the word 'MATHEMATICS'?
- In a distribution, if all observations are increased by $k$, the median:
- If $x_1, x_2...x_n$ are observations such that $\sum (x_i - 2) = 20$ and $\sum (x_i - 5) = -10$, then $n$ is:
- A student scored 60, 70, and 80 in three tests. What score does he need in the fourth test to have a mean of 75?