Page 168 - DMGT404 RESEARCH_METHODOLOGY

Research Methodology

Notes 9. Calculate mean deviation from median for the following data:
Wages per week 50 - 59 60 - 69 70 - 79 80 - 89 90 - 99 100 - 109 110 - 119
No. of Students 15 40 50 60 45 90 15

10. Calculate the coefficient of mean deviation from mean and median from the following
data:

Marks 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60 60 - 70 70 -80 80 -90
No. of 2 6 12 18 25 20 10 7
Students

11. Calculate mean deviation from mode of the following data:
(a) 7, 4, 6, 4, 4, 5, 2, 4, 1, 7, 7, 6, 2, 3, 4, 2

Size 0 - 10 10 - 20 20 - 30 30 - 40 40 - 50 50 - 60
(b)
Frequency 6 20 44 26 3 1

12. Calculate the standard deviation of the following series:
Size 0 - 10 10 - 20 20 - 30 30 - 40 40 - 50
Frequency 10 8 15 8 4

13. Calculate the standard deviation from the following data:

Age less than (in years) 10 20 30 40 50 60 70 80
No. of Persons 15 30 53 75 100 110 115 125

14. 14.Find out standard deviation from the following data:
Mid Value 30 35 40 45 50 55 60 65 70 75 80

Frequency 1 2 4 7 9 13 17 12 7 6 3

Answers: Self Assessment

1. Summarisation 2. averages
3. Arithmetic Mean 4. Shortcut Method
5. Positional 6. Frequencies
7. Charlier’s 8. Two equal
9. Frequency 10. Deciles

11. 3 12. Maximum
13. Mode 14. Dispersion
15. Variance

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