A survey of licensed drivers inquired about running red lights. One question asked, "Of every ten motorists who run a red light, about how many do you think will be caught?" The mean result for 865 respondents was x⎯⎯⎯ = 1.75 and the standard deviation was s = 1.86 . For this large sample, s will be close to the population standard deviation sigma, so suppose we know that sigma = 1.86 .

The mountain springs water company has two departments, purifying and bottling. the bottling department received 67,000 liters from the purifying department. during the period, the bottling department completed 65,000 liters, including 3,000 liters of work in process at the beginning of the period. the ending work in process was 5,000 liters. how many liters were started and completed during the period?