Question
CVS Pharmaceuticals has produced a new test for Covid-19: a debilitating virus that affects the marble-color preferences of infected people and infects about 1.5% of
CVS Pharmaceuticals has produced a new test for Covid-19: a debilitating virus that affects the marble-color preferences of infected people and infects about 1.5% of the human population. According to data collected by the World Health Organization (the WHO), the test has asensitivity(true positive rate) of 99% and aspecificity(true negative rate) of 94%.
(1) What is the probability that a randomly selected person tests positive for Covid-19, assuming that they are in fact infected with the virus?
0.985
", "
0.060
", "
0.010
", "
0.990
(2) What is the probability that a randomly selected person tests positive for Covid-19?
0.990
", "
0.107
", "
0.074
", "
0.061
(3) What is the probability that a randomly selected person is infected with Covid-19 if they test positive for the virus?
0.38
", "
0.31
", "
0.26
", "
0.20
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