EXAMPLE 2.34

Add the margins to the table. We expand the table in Example 2.33 by adding the totals for each row, for each column, and the total number of all the observations. Here is the result:

Two-way table for “met requirement” and age
Age (years)
Met requirement 5 to 10 11 to 13 Total
No 194 557 751
Yes 861 417 1278
Total 1055 974 2029

138

In this study there were 1055 children aged 5 to 10. The total number of children who did not meet the calcium requirement is 751, and the total number of children in the study is 2029.