Please help answer questions 3a to 3e. A medical researcher has conducted tests

Question

Please help answer questions 3a to 3e. A medical researcher has conducted tests on a new method of detecting hepatic (liver) tumors in heavy drinkers and wants to report his findings in the Journal of the American Medical Association. The following table shows his results. a. What is the prevalence of hepatic tumors? b. What is the sensitivity of this test? c. What it the false negative rate for this test? d. What is the positive predictive value for this test? e. (Bonus) Based on your answers would you consider using this test as a health professional? Explain your reasoning.

Explanation / Answer

from above:

a) prevalence =150/1000=0.15

b) sensitivity =135/150=0.90

c) false negative rate =1-sensitivity =1-0.90=0.10

d)positive predictive value =135/220 =0.6137

e)we are not spposed to consider this test as it has low sensitivity and speciificity due to which chance of error are high

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