The marketing department for an upscale retail catalog company wants to determine if there are differences in the mean customer purchase amounts across the available purchase sources (Internet, phone, or mail-in). Accordingly, samples were taken for 20 random orders for each purchase source. The following ANOVA table was produced. Assume purchase amounts are normally distributed.

At the 5% significance level, can we conclude that the mean purchase amount is different across the three purchase sources?

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Source of Varlation df MS p-value 12715.23 2 Between 6357.62 0.433 0.651 Groups 836704.70 57 14679.03 Within Groups 849419.93 59 Total