the residents of town x participated in a survey to determine the number of hours per week each resident spend watching tv,the distribution of the results of the survey had a mean of 21 hours and a stand deviation of 6 hours.the number of hours the 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 | 
