Xavier went to Gamer Realm to buy new video games. Gamer Realm was having a sale: $65 for video games. He bought games for himself and one game for his friend, Dimitrius, but Xavier does not know how much Dimitrius owes him for the one game. What is the unit price of the video games? What is the rate unit?

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 μ, the mean duration of game play. 4028 4316 4816 4650 4036 5010 4833 4331 4307