Question
For the study purpose, the mean of the observations is 148 gm and standard deviation is 17.4 gm. Approximately, the coefficient of variation equals to:
This question was previously asked in
SSC CGL 2018 (Tier 2) Statistics Previous Year Paper (22-feb-2018)
The correct answer is
0.12
The Coefficient of Variation is the ratio of standard deviation to mean:
\[CV = \frac{\sigma}{\bar{x}} = \frac{17.4}{148} \approx 0.1176\]
Rounded to two decimals this is 0.12.
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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?
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