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प्रश्न
Find the mean deviation from the median for the data:
| xi | 15 | 21 | 27 | 30 | 35 |
| fi | 3 | 5 | 6 | 7 | 8 |
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उत्तर
| xi | fi | Cumulative Frequency | \[\left| x_i - 30 \right|\]
|
\[f_i \left| x_i - 30 \right|\]
|
| 15 | 3 | 3 | 15 | 45 |
| 21 | 5 | 8 | 9 | 45 |
| 27 | 6 | 14 | 3 | 18 |
| 30 | 7 | 21 | 0 | 0 |
| 35 | 8 | 29 | 5 | 40 |
|
\[N = \Sigma f_i = 29\]
|
\[\sum^n_{i = 1} f_i \left| x_i - 30 \right| = 148\]
|
Here,
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