Chi-squared Faker

Stage: 5 Challenge Level: Challenge Level:2 Challenge Level:2

To perform a Chi-squared test you need to ensure that the data are grouped into expected categories so that the expected frequencies in all of the classes are 5 or more.

How might this grouping be made to increase or decrease the final test statistic?

You will need to use tables to determine the significance of the final answer.


The NRICH Project aims to enrich the mathematical experiences of all learners. To support this aim, members of the NRICH team work in a wide range of capacities, including providing professional development for teachers wishing to embed rich mathematical tasks into everyday classroom practice. More information on many of our other activities can be found here.
Copyright © 1997 - 2012. University of Cambridge. All rights reserved.
NRICH is part of the family of activities in the Millennium Mathematics Project.