Investigating the properties of a test for hypertension

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Researchers are investigating the properties of a test for hypertension. Suppose that 84% of hypertensives and 23% of nonhypertensives are classified as hypertensive by an automated blood-pressure machine. Suppose that 20% of the population is hypertensive.

a) Find the value of the SENSITIVITY. Please give your answer to 2 decimal places.

b) Find the value of the SPECIFICITY. Please give your answer to 2 decimal places.

c) Find the value of PREVALENCE. Please give your answer to 2 decimal places.

d) What is the probability of a false positive test? Please give your answer to 2 decimal places.

e) What is the probability of a false negative test? Please give your answer to 2 decimal places.

f) What is the predictive value of a positive test result? In other words, what is the probability that an individual who returns a positive tests for hypertension is hypertensive? Please give your answer to 3 decimal places.

g) What is the predictive value of a negative test result? In other words, what is the probability that an individual who returns a negative tests for hypertension is not hypertensive? Please give your answer to 3 decimal places.

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