Unformatted text preview: is enough evidence to support the
claim that there is a difference in the mean
scores of the front, middle, and back rows
The ANOVA doesn’t tell which row is
different, you would need to look at
confidence intervals or run post hoc tests
to determine that
36 Practice Question
Three suppliers provide parts in shipments of 500 units.
Random samples of six shipments from each of the three
suppliers were carefully checked, and the numbers of parts
not conforming to standards were recorded. These numbers
are listed in the table. Test the hypothesis that means of these
non-standard parts per shipment are same.
Supplier A Supplier B Supplier C 28 22 33 37 27 29 34 29 39 29 20 33 31 18 37 33 30 38 37...
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- Spring '13