Easy
Medium
Hard
100

5 divided by39090

7818

100

6 divided by 12.6 to the third power

2.6

100

26 divided by 63.70

2.45

200

4 divided by 31672


7918

200

39 divided by 55.38

1.42

200

10 is what percent of 60?

16.66

300

7 divided by 63518

9074

300

17 divided by 315.35


18.55

300

25 x 25.632

640.8

400

4 divided by 19912


4978

400

5 divided by 34567


6,913.400


400

200 patients are enrolled in a study to evaluate the accuracy of a new ELISA-based test for the diagnosed of influenza.  100 patients were diagnosed  with influenza by the reference standard culture of respiratory secretions. 80 of the patients with influenza had a positive ELISA-based test as did 5 of the patients without influenza .What is the positive likelihood ratio of the ELISA-based test?

LR+ 16

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