You are given the following statistics:
Treatment
14.5 Xr14-05 A consumer organization was concerned about the differences between the advertised sizes of containers and the actual amount of product. In a preliminary study, six packages of three different brands of margarine that are supposed to contain
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Statistic
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1
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2
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3
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500 ml were measured. The differences from 500 ml
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n
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4
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4
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4
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are listed here. Do these data provide sufficient evi-
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x
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20
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22
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25
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dence to conclude that differences exist between the
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s2 10 10 10
a. Complete the ANOVA table.
b. Repeat part (a) changing the variances to 25 each.
c. Describe the effect on the F-statistic of increasing the sample variances.