Exam 1

1. Metainformation

   Tag	Value
   file	Probability_uva-random-variables-127-en_uva-random-variables-127-en
   name	uva-random-variables-127-en
   section	Probability/Elementary Probability/Random variables
   type	schoice
   solution	TRUE, FALSE, FALSE
   Type	Conceptual, Calculation
   Language	English
   Level	Statistical Literacy
   IRT-Difficulty	0.552
   p-value	0.9036

   Question

   A diagnostic tool for the rare tropical disease Koeles Black Fever (KBF) has sensitivity 0.80 and specificity 0.90. The probability of a traveler contracting the disease is 0.02. What is the probability that someone who the tool says has the disease actually has KBF suffers from KBF?

   
   
   1. TRUE: 0.14
   2. FALSE: 0.50
   3. FALSE: 0.72
   
   
   1. 0.14: Correct
   2. 0.50: Incorrect
   3. 0.72: Incorrect