This is a stat class for biology major.

To test for an association between health insurance status and getting a mammogram,investigators surveyed 400 women with private health insurance and 300 women onMedicaid. All the women were between ages 40 and 64, and were asked whether theyhad gotten a mammogram within the past two years. These were the results:

Mammogram within past two years? Yes No Health Private 302 98 400 insurance Medicaid 193 107 300 495 205 700