I. A recycled paper distributor places empty containers in
various locations; these are gradually filled with the old
newspapers and similar materials brought in by various individuals.
The containers are collected (and replaced with other empty ones)
following different routes. In one of such journeys, the collection
is made every two weeks. This plan is advisable if the average
amount of recycled paper in each two-week period is greater than
1600 cubic feet. Different records for 18 two-week periods show...