At a cell phone assembly plant, 82% of the cell phone keypads pass inspection. A random sample of 101 keypads is analyzed. Find the probability that the proportion of the sample keypads that pass Inspection is between 0.75 and 0.87.
A) 0.8713
B) 0.9049
C) 0.9664
D) 0.0336

Question

Quizplus · Accepted Answer

The probability that the proportion of the sample keypads that pass inspection is between 0.75 and 0.87 is 0.8713. This can be calculated using the normal distribution with mean 0.82 and standard deviation 0.03.

At a Cell Phone Assembly Plant, 82% of the Cell