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
- A spinner is divided into 4 equal sectors colored Red, Blue, Green, and Yellow. What is the probability of spinning Blue?
- What is the mean of the first five multiples of 3?
- If the mean of 6, 8, 5, 7, x and 4 is 7, then x is:
- In the formula for median of grouped data $L + \frac{\frac{N}{2} - cf}{f} \times h$, what does 'cf' represent?
- If each observation is decreased by 10%, the mean: