Question
The production manager of Hinton Press is determining the average time needed to photograph one printing plate. Using a stopwatch and observing the platemakers, he collects the following times (in seconds):
20.4 20.0 22.2 23.8 21.3 25.1 21.2 22.9 28.2 24.3
22.0 24.7 25.7 24.9 22.7 24.4 24.3 23.6 23.2 21.0
An average per-plate time of less than 23.0 seconds indicates satisfactory productivity. Should the manager be concerned
20.4 20.0 22.2 23.8 21.3 25.1 21.2 22.9 28.2 24.3
22.0 24.7 25.7 24.9 22.7 24.4 24.3 23.6 23.2 21.0
An average per-plate time of less than 23.0 seconds indicates satisfactory productivity. Should the manager be concerned
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