The residents of Town X participated in a survey to determine the number of hours per week each resident spent watching TV. The distribution of the results of the survey had a mean of 21 hours and a standard deviation of 6 hours. The number of hours that Pat, a resident of Town X, watched TV last week was between 1 and 2 standard deviations below the mean. Which of the following could be the number of hours that Pat watched TV last week? 30; 20; 18; 12; 6. The answer is D, but I choose C.....Thank you.
欢迎光临 国际顶尖MBA申请交流平台--TOPWAY MBA (http://forum.topway.org/)
