Advertisements
Advertisements
Question
What is standard error?
Advertisements
Solution
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")` |
APPEARS IN
RELATED QUESTIONS
Give two examples each of sample, population and variable.
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 sampling distribution of a statistic?
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 finite subset of statistical individuals in a population is called ______
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
