A cosmetics manufacturer’s regional distribution center has four workstations that are responsible for
packing cartons for shipment to small retailers. Each workstation is staffed by three workers. The
number of cartons packed per day for a recent week (5 days) were recorded for each station and
analyzed to determine whether there is a significant difference in the mean number of cartons packed.
The results of this analysis resulted in SST (total) = 3393.2 and SSTr (workstations) = 1492.3.
At the 0.05 level of significance, analyze the data to determine whether there is evidence of a difference
in the mean number of cartons packed for each workstation.
After the accident in which John F. Kennedy, Jr. died while piloting his airplane at night from New York to
Cape Cod, a random telephone poll was taken in which New Yorkers were asked, “Should private pilots be
allowed to fly at night without an instrument rating”? The results are presented below:
Is opinion independent of aviation experience?