A laboratory worker finds that 1.6% of his blood samples test positive for the HIV virus.In a random sample of 140 blood tests,what is the mean number that test positive for the HIV virus?
A)2.24
B)137.76
C)1.48
D)2.20
E)22.4

Question

Quizplus · Accepted Answer

The mean number of positive tests in a sample of 140 is found by multiplying the total number of tests by the percentage that test positive: 140 * 0.016 = 2.24.

A Laboratory Worker Finds That 1