A manufacturer advertised that the time it takes a person to assemble a bookcase has been shown to be normally distributed with a mean equal to 125 minutes with a standard deviation equal to 20 minutes. Given this information, the probability that it will take a randomly selected person more than 105 minutes is about 0.1587.

Question

Quizplus · Accepted Answer

The probability that it will take more than 105 minutes to assemble the bookcase is actually higher than 0.1587 because 105 minutes is below the mean (125 minutes) in a normal distribution, and the area to the right of 105 minutes would include the majority of the distribution.

A Manufacturer Advertised That the Time It Takes a Person