Question

A test subject is randomly selected for a diabetes test. What is the probability of getting a subject who is not diabetic, given that the test result is negative? Find the probability using the data table.
Positive Test Negative
Test
Subject is diabetic 35 3

Subject is not diabetic 5 28

Answer 1

                                           Positive Test           Negative Test
Subject is diabetic             35                                  3                      38
Subject is not diabetic        5                                28                       33
Total                                      40                               31                       71

Probability of getting a subject that is not diabetic, given that the result is negative. 

28/31 = 0.903 or 90.3%

The answer is 90.3%.