A New Serologic Test Has Been Developed for the Detection

question 96

Multiple Choice

A new serologic test has been developed for the detection of active pulmonary tuberculosis and is compared to the gold standard of sputum mycobacterial culture.  A total of 1000 subjects are randomly selected for testing from a population with a high prevalence of tuberculosis.  Results of the study are given below: Which of the following is the positive predictive value of the test under study?

• A)130/180
• B)130/190
• C)180/1000
• D)760/810
• E)760/820

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Definitions:

Average Total Cost Curve

A graphical representation showing the average total cost of producing various output levels, typically U-shaped due to economies and diseconomies of scale.

Total Cost

The aggregate cost involved in manufacturing goods or offering services, which covers both stable and changeable outlays.

Producing

The process of creating goods or services to be sold or used, involving various inputs to generate output.

Boots

Boots are a type of footwear that cover the feet and the ankles, and sometimes extend up to the knees or hips, designed for various purposes including fashion, protection, and work.