‏Which behavior would best describe someone who has good communication skills with customers ? a ) Following up with some customers b ) Talking to customers more than listening to them c ) Repeating back what the customer says d ) Interrupting customers frequently

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