1. The table below summarizes data collected in a stud to evaluate a new screening test for ovarian cancer. A total of 200 women are involved in the study. Fifty have ovarian cancer and 150 do not.

Screening test Ovarian cancer Free of ovarian cancer

Positive 28 23

Negative 22 127

Total50 150

1. Find the sensitivity of the screening test.

2. Find the false positive fraction of the screening test.

3. What proportion of women who screen positive actually have ovarian cancer?