Class XI
Statistics for Economics
Chapter - 11
Measures of Dispersion
Worksheet – 2
Ques.1. Write the formula to calculate:
(i) Coefficient of Variation
(ii) Mean Deviation from Median
(iii) Inter Quartile Range
(iv) Coefficient of Range
(v) Standard Deviation from short-cut method
Ques.2. In a town, 25% of the persons earned more
than Rs.45000.00 whereas 75% earned more than Rs.18000.00. Calculate the
absolute and relative values of dispersion.
Ques.3. If mean is 75, find out the new mean value
if,
(i) each observation is multiplied by 5.
(ii) 7 is added to each observation.
Ques.4.
Following data show the runs made by Sachin and Sourabh in different innings.
Find out:
(i) who is good scorer?
(ii) who is consistent player?
|
Sachin
|
92
|
17
|
83
|
56
|
72
|
76
|
64
|
45
|
40
|
32
|
|
Sourabh
|
28
|
70
|
31
|
00
|
59
|
108
|
82
|
14
|
3
|
95
|
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