Business Statistics Made Easy in SAS

Further Statistical Questions about Categorical Data

Just generating and looking at frequency tables or crosstabs such as those above is not necessarily the last step. You may also wish to ask various questions such as:

• Are the distributions of observations between categories or cells even (there are roughly equal numbers in each cell), or are there cells with significantly greater or lower frequency than the numbers in another cell? For instance, in Figure 15.2 Crosstab example of relating two categorical variables above you can see that the numbers in the six cells are not even. Clearly, the 56 observations in the Small/Freeware cell are more numerous than the 22 in Small/Premium. However, in other cases these differences may not be ...