Questions (5)
Q75EPFO2015
The mean and standard deviation of a set of 16 non-zero positive numbers in an observation are 26 and 3·5 respectively. The mean and standard deviation of another set of 24 non-zero positive numbers without changing the circumstances of both sets of observations, are 29 and 3, respectively. The mean and standard deviation of their combined set of observations will respectively be
- A 27·8 and 3·21 ✓
- B 26·2 and 3·32
- C 27·8 and 3·32
- D 26·2 and 3·21
✓ Correct answer: (A)
Quantitative Aptitude › Data Sufficiency
Q94EPFO2015
For which time intervals, is the percentage rise of population the same for the following data ? Period / Population: 1970 / 40,000; 1980 / 50,000; 1990 / 60,000; 2000 / 72,000; 2010 / 80,000
- A 1970 – 80 and 1980 – 90
- B 1980 – 90 and 1990 – 2000 ✓
- C 2000 – 2010 and 1990 – 2000
- D 1980 – 90 and 2000 – 2010
✓ Correct answer: (B)
Quantitative Aptitude › Data Sufficiency
Q107EPFO2015
Which of the following is not an absolute measure of dispersion ?
- A Range
- B Mean Deviation
- C Quartile Deviation
- D Coefficient of Variation ✓
✓ Correct answer: (D)
Quantitative Aptitude › Data Sufficiency
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