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(b) Mean deviation
(c) Coefficient of variation (d) Range
2. Absolute sum of deviations is minimum from
(a) Mode
(b) Median
(c) Mean
(d) None of the above
186 3. In a distribution S.D = 6. All observation multiplied by 2 would
give the result to S.D is
(a) 12
(b)6
(c) 18
(d) 6
4. The mean of squared deviations about the mean is called
(a) S.D
(b) Variance (c) M.D
(d) None
5. If the minimum value in a set is 9 and its range is 57, the
maximum value of the set is
(a) 33
(b) 66
(c) 48
(d) 24
6. Quartile deviation is equal to
(a) Inter quartile range
(b) double the inter quartile range
(c) Half of the inter quartile range (d) None of the above
7. Which of the following measures is most affected by extreme
values
(a) S.D
(b) Q.D
(c) M.D
(d) Range
8. Which measure of dispersion ensures highest degree of
reliability?
(a) Range
(b) Mean deviation (c) Q.D
(d) S.D
9. For a negatively skewed distribution, the correct inequality is
(a) Mode < median
(b) mean < median
(c) mean < mode
(d) None of the above
10. In case of positive skewed distribution, the extreme values
lie in the
(a) Left tail
(b) right tail (c) Middle
(d) any where
II. Fill in the blanks:
11. Relative measure of dispersion is free from ___________
12. ___________ is suitable for open end distributions.
13. The mean of absolute deviations from an average is called
________
14. Variance is 36, the standard deviation is _________
15. The standard deviation of the five observations 5, 5,5,5,5 is
_________
16. The standard deviation of 10 observation is 15. If 5 is added to
each observations the vale of new standard deviation is
________
17. The second central moment is always a __________
187 18. If x = 50, mode = 48, σ = 20, the coefficient of skewness shall
be _______
19. In a symmetrical distribution the coefficient of skewness is
_______
20. If β2 = 3 the distribution is called ___________
III. Answer the following
21. What do you understand by dispersion? What purpose does a
measure of dispersion ser...
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This note was uploaded on 01/18/2014 for the course BUS 100 taught by Professor Moshiri during the Winter '08 term at UC Riverside.
 Winter '08
 Moshiri
 Business

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