Statisticshard · Past Paper
In a dataset, the mean is 15 and the coefficient of variation is 20%. Find the standard deviation.
A3
B300
C0.75
D5
✓ Correct Answer: A — 3
C.V. = (S.D. / Mean) * 100. 20 = (S.D. / 15) * 100. 20/100 = S.D. / 15. 0.2 * 15 = 3.
Share this question
More from Statistics
- If the mean of x, x+3, x+6, x+9, x+12 is 10, find x.
- In a pie chart representing a student's time, if 'Sleep' takes 8 hours, what is its central angle?
- Two dice are thrown. What is the probability that the sum is a multiple of 5?
- If the sum of 10 observations is 150, what is the mean?
- In a single throw of two dice, what is the probability of getting a doublet?