12.62 An experiment was conducted to compare the yields of orange juice for six different juice extractors. Because of a possibility of a variation in the amount of juice per orange from one truckload of oranges to another, equal weights of oranges from a single truckload were assigned to each extractor, and this process was repeated for 15 loads. The amount of juice recorded for each extractor and each truckload produced the following sums of squares:

a Complete the ANOVA table.
b Do the data provide sufficient evidence to indicate a difference in mean amount of juice extracted by the six extractors? Use 0.05.

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Source df SS MS F-ratio Extractor 84.71 Truckload 159.29 Error 94.33 Total 339.33