In order to evaluate the diagnostic accuracy of a new rapid test for Tuberculosis,results of the screening test were compared to the Reference golden standard(confirmatory test) in 20,000 patients. From 1200 individuals who tested positiveby the rapid test, only 400 were confirmed +ve. From 18800 individuals whotested negative by the rapid test, 1200 were confirmed tuberculosis -ve. ThePositive predictive value and the Negative predictive value of this screening testare:O PPV-0.333 & NPV30.064O PPV=0.667 & NPV=0.936O PPV=0.936 & NPV-0.667PPV=0.064 & NPV30.333 Find the outliers in the following data : 280-500-300-450-330-370-400O No outlierO 550 onlyO 280 only280 and 550

given, 400 +ve confirmed from 1200. 1200 +ve confirmed from 18800.

Answered: In order to evaluate the diagnostic…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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In the initial test of the Salk vaccine for polio, 400,000 children were selected and divided into two groups of 200,000. One group was vaccinated with the Salk vaccine while the second group was vaccinated with a placebo. Of those vaccinated with the Salk vaccine, 33 later developed polio. Of those receiving the placebo, 115 later developed polio. Test of the claim that the Salk vaccine is effective in lowering the polio rate. Use a significance level of 0.01.
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The nutrition and food science division of Farnsworth Pharmaceuticals is alpha testing an OTC diagnostic kit so that adults who self-report a certain food allergy can affirm their insensitivity to that food allergen. Preliminary clinical trials yielded that 25% of the volunteers who suspected they had food allergies were clinically identified as sensitive or intolerant to the food allergen; unfortunately and disappointingly, only 10% of those who tested positive in the clinic also tested positive with the kit. Furthermore, of those self-reporting adult volunteers who had a negative clinic outcome, 5% tested positive anyway with the kit. [COMMENTS & HINTS: Consider clinical sensitivity to the food allergen a positive result for testing purposes. If necessary, round off percentages to the nearest hundredth, expressing as #.##% or ##.##%.] question If 25% of the positive results from the clinical diagnoses ended up as positive result of food sensitivity or intolerance, then…
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