Use the following information for Questions below.

The following data were collected during an evaluation of a new screening test. For Questions 2-7, calculate the sensitivity, specificity, positive and negative predictive values and accuracy of the test, as well as the prevalence of the disease within the sample population, using data in the table below.

	Gold Standard Outcome(+)	Gold Standard Outcome (-)	Total
New Test (+)	119	40	159
New Test (-)	9	262	271
Total	128	302	430

Question 1:

What is the Sensitivity of the new screening test? Give your answer as a percentage rounded to one decimal place (ex: 15.1%).

Question 2:

What is the Specificity of the new screening test? Give your answer as a percentage rounded to one decimal place (ex: 15.1%).

Question 3:

What is the positive predictive value (PPV) of the new screening test? Give your answer as a percentage rounded to one decimal place (ex: 15.1%).

Question 4:

What is the negative predictive value (NPV) of the new screening test? Give your answer as a percentage rounded to one decimal place.

Question 5:

What is the prevalence of the disease within the sample described above? Give your answer as a percentage rounded to one decimal place.

Question 6:

What is the accuracy of the test within the sample described above? Give your answer as a percentage rounded to one decimal place.