INDIAN SCHOOL MUSCAT DEPARTMENT OF COMMERCE AND HUMANITIES Statistics for Economics Class : 11
Reference: NCERT text book Date of submission ------------------2017
Worksheet on Range and Quartile Deviation Economics (030)
Date of issue --------------2017
I. Answer the following. a. Define deviation b. What does Range mean? c. State formula of coefficient of Range. d. State any two demerits of Range. e. What is interquartile range? f. What is the other name for semi interquartile range? II. Calculate Range and coefficient of range for the following. a. X:
52 19 18 21
b. X: 6 F: 10
6 15
7 17
c. Classes: 5-10 Frequency: 8
8 30
22 45 23 27 37 30 31 42 9 25
10 20
11 10
12 4
13 2
10-15 15-20 20-25 25-30 30-35 35-40 40-45 16 14 10 3 1 2 2
III. Calculate and quartile range, quartile deviation and its coefficient. 1. Value: 58 Frequency: 2
59 3
60 6
61 15
62 10
63 5
64 4
60 33
70 35
65 3
66 1
2. Calculate quartile deviation Classes: 50-60 60-70 70-80 80-90 90-100 Frequency: 11 17 32 28 12 3. Less than: 10 Frequency: 5
20 8
30 15
40 20
50 30
IV. Calculate Quartile deviation and its coefficient for the following. 1.
15
48
35
17
19
25
30
2. Classes: 0-10 10-20 20-30 30-40 40-50 50-60 60-70 70-80 Frequency: 4 6 8 10 8 6 5 3 ************* ISM/SENIOR SECTION/ECONOMICS/CLASS 11 - 2017-2018
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