Question
If x i| f i, i = 1, 2 … n is a frequency distribution with standard deviation 15 and mean 30, the coefficient of variation will be equals to:
This question was previously asked in
SSC CGL 2018 (Tier 2) Statistics Previous Year Paper (22-feb-2018)
The correct answer is
50
The coefficient of variation expresses the standard deviation as a percentage of the mean:
\[CV=\frac{\sigma}{\bar x}\times 100\]
Substituting \(\sigma=15\) and \(\bar x=30\):
\[CV=\frac{15}{30}\times 100=50\]
Therefore CV = 50.
Was this answer helpful?
Important Questions from Coefficient of Variation
Consider the following statements:
1. Coefficient of variation depends on the unit of measurement of the variable.
2. Range is measure of dispersion.
3. Mean deviation is least when measured about median.
Which of the above statements are correct?In a study of two groups, the following results were obtained:
Group A
Group B
Sample size
20
25
Sample mean
22
23
Sample standard deviation
10
12
Which of the following statements is correct?
Need Expert Advice?
Upcoming Exams
Test Series
SSC
SSC CGL (Tier I + Tier II) 2026 Mock Test Series - Latest Pattern
2500 Tests 6 Tests Free
3945 Attempts
4.2(838)
English, Hindi
More Questions from SSC CGL
