Asked by jamie

a light bulb manufacture gaurentees that the mean life of a certain type of bulb is at least 875 hours. A random sample of 40 light bulbs has a mean life of 863 hours with a standard deviation of 50. a=0.04
Answered by PsyDAG
What is your question?
Answered by green
Work: A random sample of 100 light bulbs has a mean lifetime of 3000 hours. Assume that the population standard deviation of the lifetime is 500 hours. Construct a 95% confidence interval estimate of the mean lifetime


Answered by Gladwin
What
percentage of light bulb fail to satisfy to guarantee
There are no AI answers yet. The ability to request AI answers is coming soon!