For a 95% Level of Confidence, the Sample Size Needed

question 51

Multiple Choice

For a 95% level of confidence, the sample size needed to get a margin of error of m percentage points can be approximated using:

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Definitions:

Nonparametric Tests

Statistical tests that do not assume a specific distribution for the data, making them suitable for analyzing ordinal data or when the assumptions for parametric tests are not met.

Nonparametric Statistical Methods

Statistical methods that do not assume a specific distribution for the data, often used when data doesn't meet the assumptions required for parametric tests.

Parametric Test

A statistical test that makes assumptions about the parameters of the population distribution from which the sample was drawn.

Wilcoxon Rank Sum Test

A non-parametric statistical test used to compare two independent samples to assess whether their population mean ranks differ.