negativenegative, did not havedid not have The individual actually had the disea

Question

negativenegative,

did not havedid not have

The individual actually had the disease

YesYes

NoNo

PositivePositive

136136

66

NegativeNegative

2929

129129

The probability is approximately

nothing.

(Round to three decimal places as needed.)

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

negativenegative,

given that he or she

did not havedid not have

the disease.

The individual actually had the disease

YesYes

NoNo

PositivePositive

136136

66

NegativeNegative

2929

129129

Explanation / Answer

There are 66+129 = 195 who don't have the disease.

Of those, 129 tested negative.

Thus,

P(negative|no disease) = 129/195 = 0.662 [ANSWER]

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