atempis left Check my work Objects that are manufactured to certain specifications tend to vary slightly from their spec
Posted: Wed May 11, 2022 10:09 am
atempis left Check my work Objects that are manufactured to certain specifications tend to vary slightly from their specified measurements. In answering the following, assume the measurements are normally distributed. A certain type of lightbulb has a mean life of 2,400 hours with a standard deviation of 200 hours. What percentage of these bulbs can be expected to burn longer than 2,000 hours?