Question
Calculate standard deviation and coefficient of variation from the following data with the help of direct method.
| S. No. | 1 | 2 | 3 | 4 | 5 |
| Marks | 10 | 12 | 13 | 15 | 20 |
| S. No. | 1 | 2 | 3 | 4 | 5 |
| Marks | 10 | 12 | 13 | 15 | 20 |
| Marks (X) | $X^2$ |
| 10 | 100 |
| 12 | 144 |
| 13 | 169 |
| 15 | 225 |
| 20 | 400 |
| $\Sigma\text{X}=70,\text{n}=5$ | $\Sigma\text{X}^2=1,038$ |
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|
Students
|
Mathmatics
|
Economics
|
|
A
|
85
|
60
|
|
B
|
60
|
48
|
|
C
|
55
|
49
|
|
D
|
65
|
50
|
|
E
|
75
|
55
|
|
F
|
90
|
62
|
|
Age Group
|
0-20
|
20-40
|
40-60
|
60-80
|
80-100
|
|
Rate of Mortality
|
350
|
280
|
540
|
760
|
900
|
| Output (kg) | 0 | 1 | 2 | 3 | 4 | 5 |
| Total Cost (₹) | 40 | 100 | 120 | 130 | 150 | 190 |
| Employment of Variable Factor (Units) | Employment of Fixed Factor (Units) | Total Physical Product (Units) |
| 0 | 5 | 0 |
| 1 | 5 | 10 |
| 2 | 5 | 24 |
| 3 | 5 | 40 |
| 4 | 5 | 56 |
| 5 | 5 | 70 |
| 6 | 5 | 80 |
| 7 | 5 | 84 |