Advertisements
Advertisements
प्रश्न
There is a certain bias involved in the non-random selection of samples.
विकल्प
True
False
Advertisements
उत्तर
This statement is true.
Explanation:
Non-random selection of items obstructs the equal chance of every item of the Universe of getting selected. Hence, there may be a high probability of involvement of the personal biases of the investigator in the non-random sample selected.
संबंधित प्रश्न
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?
Explain the procedure of selecting a random sample of 3 students out of 10 in your class, by using random number tables.
What is population?
What is sample?
What is sampling distribution of a statistic?
Explain the stratifi ed random sampling with a suitable example
Explain in detail about non-sampling error
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
Choose the correct alternative:
A random sample is a sample selected in such a way that every item in the population has an equal chance of being included
Choose the correct alternative:
In ______ the heterogeneous groups are divided into homogeneous groups
Explain the types of sampling
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
