Aresearcher is working with a group of 13 participants, 6 of whom are female and 7 of whom are male. the researcher will select one participant for the group at random, and then she will select a second participant at random from the remaining participants. what is the probability that two males will be selected?

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