Twelve different video games showing substance use were observed and the duration times of game play ( in seconds) are listed below. The design of the study justifies the assumption that the sample can be treated as a simple random sample. Use the data to construct a 99% confidence interval estimate of U, the mean duration of game play.
4044 3877 3868 4019 4320 4818 4661 4040 5012 4831 4327 4311
What is the confidnence interval estimate of the population mean?