Question

The data represent the results for a test for a certain disease. Assume one individual from the group is randomly selected. Find the probability of getting someone who tests ​negative, given that he or she has the disease.

Answer 1

`Probability = 0.0470`

Explanation:

This question has missing detail. (See attachment for the data)

Required

Determine the probability that a selected individual who has the disease test negative.

This type of probability is referred to as conditional probability.

First, we need to get the number of individuals who have the disease.

`Disease =142 + 7`

`Disease =149`

Next, we list out the number of individual who have the disease but is negative.

`Negative = 7`

The probability is then calculated as:

`Probability = (Negative)/(Disease)`

`Probability = (7)/(149)`

`Probability = 0.04697986577`

`Probability = 0.0470` (approximated)