The residents of town x participated in a survey to determine the number of hours per week each resident spent watching television. The distribution of the results of the survey had a mean of 21 hours and a standard distribution of 6 hours. The number of hours that Pat, a resident of town X, watch television 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 television last week?
30
20
18
12
6
30
20
18
12
6
