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प्रश्न
What is standard error?
उत्तर
The standard deviation of the sampling distribution of a statistic is known as its Standard Error abbreviated as S.E.
| S.NO | Statistic | Standard Error |
| 1 | Sample mean | `sigma/sqrt("n")` |
| 2 | Observed sample proportion | `sqrt("PQ"/"n")` |
| 3 | Sample standard deviation | `sqrt(sigma^2/(2"n")` |
| 4 | Sample variance | `sigma^2 sqrt(2/"n")` |
| 5 | Sample quartiles | 1.36263 `sigma/sqrt("n")` |
| 6 | Sample median | 1.25331 `sigma/sqrt("n")` |
| 7 | Sample correlation coefficient | `((1 - "p"^2))/sqrt("n")` |
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| 1904 | 1559 | 3473 | 1735 | 2760 |
| 2041 | 1612 | 1753 | 1855 | 4439 |
| 5090 | 1085 | 1823 | 2346 | 1523 |
| 1211 | 1360 | 1110 | 2152 | 1183 |
| 1218 | 1315 | 1105 | 2628 | 2712 |
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| 1397 | 1832 | 1962 | 2177 | 2575 |
| 1293 | 1365 | 1146 | 3222 | 1396 |
Monthly Household Expenditure (in Rupees) on Food of 50 Households
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(b) more than Rs 3000
(c) between Rs 1500 and Rs 2500
