At a cell phone assembly plant, 77% of the cell phone keypads pass inspection. A random sample of 111 keypads is analysed. Find the probability that the proportion of the sample keypads that pass inspection is between 0.72 and 0.8

Question

Quizplus · Accepted Answer

The probability that the proportion of the sample keypads that pass inspection is between 0.72 and 0.8 is 0.6677. This can be calculated using the normal distribution with a mean of 0.77 and a standard deviation of 0.03.

At a Cell Phone Assembly Plant, 77% of the Cell