Chi-Squared Test

Specification

• List B from Topic B (Cognitive), focusing on the chi-squared test.

The chi-squared test is a non-parametric statistical test of difference or association that allows researchers to see if their results are significant. It is used for studies that have an independent groups design, where the data collected is nominal (in categories).

Chi-Squared Distribution Formula

Past Paper Questions

• Angela used a chi-squared test to analyse the data from her study. Justify the use of a chi-squared test for this data. (2) June 2016

• Give two reasons, other than the type of data, why Mateo used a chi-square statistical test. (2) October 2017

• Calculate the chi-squared for the data gathered by Aljaz by completing Table 4. You should give your answer to two decimal places. The formula can be found in the formulae and statistical tables at the front of the exam paper. (4) June 2018