A certain vending company’s soft-drink dispensing machines are supposed to serve 6 oz of beverage. Various machines were sampled, and the resulting amounts of dispensed drink (in ounces) were recorded, as shown in the following table.

Machines A B C D E 3.8 6.8 4.4 6.5 6.2 4.2 7.1 4.1 6.4 4.5 4.1 6.7 3.9 6.2 5.3 4.4 4.5 5.8 Does this sample evidence provide sufficient reason to reject the null hypothesis that all five machines dispense the same average amount of soft drink? Use   0.01.

a. Solve using the p-value approach.

b. Solve using the classical approach.