Question: A supermarket chain is considering two sources A and B for the purchase of 50-pound bags of onions. The following table gives the results of

A supermarket chain is considering two sources A and B for the purchase of 50-pound bags of onions. The following table gives the results of a study.
A supermarket chain is considering two sources A and B

Test at α = 0.05 whether there is a difference in the mean weights.

Number of bags weighed Mean weight Sample variance Source A 80 105.9 0.21 Source B 100 100.5 0.19

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