study inclues 17031 people in general population.

*211 have coeliacs disease (determined by biopsy)

• 178 have coeliacs and test pos with new test
• 14799 do not have coeliacs and test neg with new test

D+ D- total

T+

T-

Total

1) are these 2 events independent and why?

2) probability of testing pos with new test or diagnose with coeliacs

3) Probability of testing pos on new test given person has coeliacs. what is this called

4) Probability of test neg on new test given person does not have coeliacs. what is this called

5) Probability of person having coeliacs, if the test if positive. what is this called

6) Probabilty of person has coeliacs given test results is neg