Sign Test

The video tutorial explains the sign test, a simple non-parametric statistical test used to determine differences in repeated measures design with nominal data. It involves counting positive and negative signs to assess changes in attitudes, such as those towards the death penalty after watching 'The Green Mile'. The tutorial covers hypothesis formulation, data collection, and calculation of the sign test. It also discusses determining statistical significance by comparing calculated values to critical values. The sign test can be used with ordinal data, offering an alternative to the Wilcoxon Test.

Explain the significance of the critical value in the sign test.

How can the sign test be applied to ordinal data?