Unit 4 – Questions
- A measure of dispersion is a good supplement to the central value in understanding a frequency distribution. Comment.
- The yield of wheat per acre for 10 districts of a state is as under:
District | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Wheat | 12 | 10 | 15 | 19 | 21 | 16 | 18 | 9 | 25 | 10 |
Calculate range and QD
3. Explain Lorenz curve
4. Calculate mean deviation using mean for the following distribution
CI | F |
20 – 40 | 3 |
40 – 80 | 6 |
80 -100 | 20 |
100 – 120 | 12 |
120 - 140 | 9 |
5. Calculate standard deviation and coefficient of SD
CI | F |
20 – 40 | 3 |
40 – 80 | 6 |
80 -100 | 20 |
100 – 120 | 12 |
120 - 140 | 9 |
6. Looking at the following values calculate range and coefficient range
20, 30, 40, 50, 200
7. Calculate range and QD
C.I | f |
0 – 10 | 5 |
10 – 20 | 8 |
20 – 30 | 16 |
30 – 40 | 7 |
40 - 50 | 4 |
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8. Which brand gives higher life using SD
Life | Brand A | Brand B |
0 – 50 | 15 | 2 |
50 – 100 | 20 | 8 |
100 – 150 | 18 | 60 |
150 – 200 | 25 | 25 |
200 - 250 | 22 | 5 |
9. Which measures of dispersion is best and how?
10. Calculate the range for the following data 1, 20, 15, 17, 16, 5, 11, 30.
