In a survey conducted by the Gallup​ Organization, 1100 adu…

 In a survey conducted by the Gallup​ Organization, 1100 adult Americans were asked how many hour they worked in the previous week. Based on the​ results, a​ 95% confidence interval for the mean number of hours worked hada lower bound of 42.7 and an upper bound of 44.5. Provide two recommendations for decreasing the margin of error of the interval.