Advertisements
Advertisements
Question
Do samples provide better results than surveys? Give reasons for your answer.
Advertisements
Solution
Samples provide better results than surveys. The advantages of samples over the survey are as follows:
1. Provides Reliable and Accurate Results- The Sample Method provides reliable and accurate results. This is because of the fact that errors can be easily located and rectified in the sampling methods due to the smaller number of items.
2. Less Time and Energy Consuming- The Sample Method involves the study of fewer items of the universe. So, this method not only saves time but also the energy of the investigator.
3. Cost-Efficient- The cost of approaching each individual unit for interrogation and collection of data is comparatively lower due to the small size of the sample.
4. Lesser Non-sampling Errors- The probability of Non-sampling Errors is also low as the sample size is smaller.
5. More Efficient- As the sample size is smaller, so small teams of enumerators can be formed. These small teams can easily be well trained and supervised. Consequently, the team is more efficient than that of the team engaged in the surveys.
6. Large Investigations- When the size of the population is very large and inapproachable, the method of sample is the most feasible.
APPEARS IN
RELATED QUESTIONS
There is a certain bias involved in the non-random selection of samples.
Non-sampling errors can be minimized by taking large samples.
In a village of 200 farms, a study was conducted to find the cropping pattern. Out of the 50 farms surveyed, 50% grew only wheat. What is the population and the sample size?
Which of the following methods give better results and why?
Discuss how you would use the lottery method to select 3 students out of 10 in your class?
What is population?
What is sample?
What is standard error?
Explain the stratifi ed random sampling with a suitable example
State any two demerits of systematic random sampling
A wholesaler in apples claims that only 4% of the apples supplied by him are defective. A random sample of 600 apples contained 36 defective apples. Calculate the standard error concerning of good apples
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 ______ of statistical individuals in a population is called a sample
Choose the correct alternative:
A finite subset of statistical individuals in a population is called ______
Choose the correct alternative:
A ______ is one where each item in the universe has an equal chance of known opportunity of being selected
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
