The researcher decides to take a closer look at the characteristics of the classes from each of the two schools. He obtains data on the income status of the students' families and classifies the students according to whether they came from a low-income family or a middle- or high-income family. The additional data are summarized in the following two cross-classification tables.Table 2: School A

Graduated
Income	Yes	No	Total
Middle- or high-income	152	17	169
Low-income	21	27	48
Total	173	44	217

Table 3: School B

Graduated
Income	Yes	No	Total
Middle- or high-income	303	23	326
Low-income	490	461	951
Total	793	484	1,277

Among students coming from middle- or high-income families, the graduation rate of for School A is than the graduation rate of for School B. Among students coming from low-income families, the graduation rate of for School A is than the graduation rate of for School B.

Your conclusions from comparing the schools' graduation rates based on the collected data in Table 1 are your conclusions from comparing the schools' graduation rates based on the unaggregated data in Tables 2 and 3.

The researcher notices that in both schools, students from middle- or high-income families have a likelihood of graduating than students from low-income families. School A has a overall graduation rate because its senior class has a higher proportion of students from families.