feedback on my answer for same question: This statement means that researchers have estimated the average number of overtime hours worked in the plumbing industry to be 3.7 hours. The confidence interval of 2.5-4.9 indicates the range of values, a lower limit of 2.5 hours and an upper limit of 4.9 hours, within which the researcher are 99% confident that the true average number of overtime hours worked in the plumbing industry falls