Twelve different video games showing substance use were observed and the duration times of game play​…

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
muμ​,
the mean duration of game play.
4056, 3878, 3852, 4028, 4323, 4813, 4656, 4027, 5007, 4816,
4330, 4313