A study was conducted to estimate the mean age when people buy their first new car. The ages of purchase for 11 randomly selected people are given below. Assume the ages are approximately normally distributed. Use a TI-83, TI-83 plus, or TI-84 calculator to determine and interpret the 99% confidence interval for the mean age. Age
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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