Elena wants to estimate what proportion of computers produced at a factory have a certain defect. A random sample of 200 computers shows that 12 computers have
the defect. She is willing to assume independence between computers in the sample.
Based on this sample, which of the following is a 95% confidence interval for the
proportion of computers that have the defect?
12(188)
O 12 + 2.5767
200
O 0.06 + 1.96V
-0.06(0.94)
200
0.06(0.94)
0.06 – 2.576 v
200
12 + 1.96
12(188)
200