16. beginning at 8: 30 a. m., tours of the national capitol and the white house begin at a tour agency. tours for the national capitol leave every 15 minutes. tours for the white house leave every 20 minutes. how often do the tours leave at the same time?  every 15 minutes  every 30 minutes  every 45 minutes  every 60 minutes

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