What is a requirement for the use of chi-square?
A) a 2 X 2 cross tabulation table.
B) an expected frequency of 5 or more in at least 80% of the cells.
C) an observed frequency of 5 or more in at least 80% of the cells.
D) a sample size of at least 100.

Question

Quizplus · Accepted Answer

The rule of thumb for using chi-square is that expected frequencies should be at least 5 or greater in at least 80% of the cells. This ensures the validity of the test and helps to avoid inaccurate results due to small sample sizes or imbalanced cell frequencies. Option A is not a requirement as chi-square can be used with tables that are larger than 2x2. Option C is incorrect as it is the expected frequency, not the observed frequency, that is important for determining when chi-square can be used. Option D is also incorrect as there is no specific sample size requirement for the use of chi-square.

What Is a Requirement for the Use of Chi-Square