A computer software vendor wants to estimate the number of times a computer will crash with it's new operating system over the course of a year. A system administrator installs the operating system on a random sample of 41 computers. At the end of a year, the sample mean number of crashes is 6.9, with a standard deviation of 3.2. Find the confidence interval at a 95% confidence level for the mean number of crashes a computer will have with the new operating system over the course of a year. The Sample Mean is
and the Margin of Error is
, so the confidence interval is (
,
). Which means that we are
confident that the true population mean number of times a computer crashes with the new operating system during the course of a year is between [LowerLimit] and [UpperLimit] .