10.64 The purchasing department for a regional supermarket chain is considering two sources from which to purchase 10-lb bags of potatoes. A random sample taken from each source shows the following results.

Idaho Supers Idaho Best Number of Bags Weighed 100 100 Mean Weight 10.2 lb 10.4 lb Sample Variance 0.36 0.25 At the 0.05 level of significance, is there a difference between the mean weights of the 10-lb bags of potatoes?

a. Solve using the p-value approach.

b. Solve using the classical approach.