Analysis of Variance

Clean All is a new all-purpose cleaner being test marketed by placing sales displays in three different locations within various supermarkets. The number of 12-ounce bottles sold from each location within each of the supermarkets is reported below:

Location-------------------------Sales
Near the bread------------20 15 24 18
Near the beer-------------12 18 10 15
With other cleaners-----25 28 30 32

(a) Perform an analysis of variance to test at the 0.05 level of significance whether there is a difference in the mean number of bottles sold at the three locations.
(b) Give also the p-value. Does the p-value agree with your location?