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education/statistics/Sampling.md
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@ -36,4 +36,6 @@ An ideal sample will represent the whole population.
| Measurement | Interviewing method influences the response, uses loaded words or ambiguities. | | Measurement | Interviewing method influences the response, uses loaded words or ambiguities. |
(Ch 20, stat 1040) (Ch 20, stat 1040)
The expected value for a sample percentage equals the population percentage. The standard error for that percentage = `(SE_sum/sample_size) * 100%` The expected value for a sample percentage equals the population percentage. The standard error for that percentage = `(SE_sum/sample_size) * 100%`
To determine by how much the standard error is affected, if `n` is the sample size, the standard error changes by $\frac{1}{\sqrt{n}}$