After data are gathered, a statistician may decide to combine logically related categories. The most likely reason for this is to
A) hide mistakes
B) increase the size of some expected values
C) increase the degrees of freedom
D) decrease the skew of the chi square distribution.

Question

Quizplus · Accepted Answer

Combining logically related categories in statistical analysis is often done to increase the size of some expected values, especially in the context of chi-square tests or when dealing with small sample sizes. This helps ensure that the statistical assumptions underlying certain tests are met, such as having a sufficient expected frequency in each category for the chi-square test to be valid.

After Data Are Gathered, a Statistician May Decide to Combine