At the gym 15 females and 30 males partisipated in a weight strength class if 40% of the females and 20% of the males also participated in the boxing class how many participents from the strength class also participated in the boxing class A. 6
B.9
C.10
D.12

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