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प्रश्न
Which of the following errors is more serious and why?
विकल्प
Sampling error
Non-Sampling error
उत्तर
Non-sampling errors are more serious than the Sampling Errors because the latter can be minimized by taking a larger sample. Non-sampling Errors emerge due to the use of faulty means of a collection of data, whereas, the Sampling Errors emerge due to the divergence between the estimated and the actual value of a parameter of a small-sized sample population. For example, errors due to personal biasness, misinterpretation of results, miscalculations, etc.
The Sampling Errors can be minimised by increasing the size of a small sample so that the difference between the actual and the estimated value is reduced. But the Non-sampling Errors are difficult to rectify as it would require the selection of a new sample and conducting a fresh survey. Thus, Non-sampling Errors are more serious than Sampling Errors.
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संबंधित प्रश्न
There is a certain bias involved in the non-random selection of samples.
Discuss how you would use the lottery method to select 3 students out of 10 in your class?
Does the lottery method always give you a random sample? Explain.
Explain the procedure of selecting a random sample of 3 students out of 10 in your class, by using random number tables.
Do samples provide better results than surveys? Give reasons for your answer.
What is statistic?
What is standard error?
Explain in detail about simple random sampling with a suitable example
State any two merits for systematic random sampling
A sample of 1000 students whose mean weight is 119 lbs (pounds) from a school in Tamil Nadu State was taken and their average weight was found to be 120 lbs with a standard deviation of 30 lbs. Calculate the standard error of the mean
A random sample of 60 observations was drawn from a large population and its standard deviation was found to be 2.5. Calculate the suitable standard error that this sample is taken from a population with standard deviation 3?
In a sample of 400 population from a village 230 are found to be eaters of vegetarian items and the rest non-vegetarian items. Compute the standard error assuming that both vegetarian and non-vegetarian foods are equally popular in that village?
Choose the correct alternative:
A ______ may be finite or infinite according as the number of observations or items in it is finite or infinite
Choose the correct alternative:
A ______ of statistical individuals in a population is called a sample
Explain the types of sampling
Write short note on sampling distribution and standard error
A sample of 100 students is drawn from a school. The mean weight and variance of the sample are 67.45 kg and 9 kg. respectively. Find (a) 95% (b) 99% confidence intervals for estimating the mean weight of the students
Use the data in the Table below that relate to monthly household expenditure (in Rs) on the food of 50 households and
| 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 |
| 4248 | 1812 | 1264 | 1183 | 1171 |
| 1007 | 1180 | 1953 | 1137 | 2048 |
| 2025 | 1583 | 1324 | 2621 | 3676 |
| 1397 | 1832 | 1962 | 2177 | 2575 |
| 1293 | 1365 | 1146 | 3222 | 1396 |
Monthly Household Expenditure (in Rupees) on Food of 50 Households
Find the number of households whose monthly expenditure on food is
(b) more than Rs 3000
(c) between Rs 1500 and Rs 2500
