Survey
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
* Your assessment is very important for improving the workof artificial intelligence, which forms the content of this project
Lifetimes of AAA batteries are approximately normally distributed. A manufacturer wants to estimate the standard deviation of the lifetime of the AAA batteries it produces. A random sample of manufacturer lasted a mean of AAA batteries produced by this hours with a standard deviation of hours. Find a confidence interval for the population standard deviation of the lifetimes of AAA batteries produced by the manufacturer. Then complete the table below. Carry your intermediate computations to at least three decimal places. Round your answers to at least two decimal places. 1. What is the lower limit of the 99% confidence interval? ___ 2. What is the upper limit of the 99% confidence interval? ___