On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a heart attack. The doctors told her that the reliability of the stress test is 67%. What is the probability that Erin will have a heart attack and the test predicts it?

0.099

0.201

0.231

0.469

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Verified Answer :

virtuematane virtuematane · Answer 1 · 2019-03-19T23:03:28-04:00

Answer:

Hence, the probability that Erin will have a heart attack and the test predicts it is:

0.469

Step-by-step explanation:

On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a heart attack.

The doctors told her that the reliability of the stress test is 67%.

The probability that she will have an heart attack and the test predicts it is:

70% of 67%.

\(=\dfrac{70}{100}\times \dfrac{67}{100}\\\\=0.469\)

Hence, the probability that Erin will have a heart attack and the test predicts it is:

0.469