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प्रश्न
What is standard error?
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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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संबंधित प्रश्न
There is a certain bias involved in the non-random selection of samples.
Give two examples each of sample, population and variable.
What is population?
Explain in detail about systematic random sampling with example
State any two merits of simple random sampling
Using the following Tippet’s random number table
| 2952 | 6641 | 3992 | 9792 | 7969 | 5911 | 3170 | 5624 |
| 4167 | 9524 | 1545 | 1396 | 7203 | 5356 | 1300 | 2693 |
| 2670 | 7483 | 3408 | 2762 | 3563 | 1089 | 6913 | 7991 |
| 0560 | 5246 | 1112 | 6107 | 6008 | 8125 | 4233 | 8776 |
| 2754 | 9143 | 1405 | 9025 | 7002 | 6111 | 8816 | 6446 |
Draw a sample of 10 three-digit numbers which are even numbers
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
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
