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Henry buys a bag of potato chips. When he opens the bag, he is surprised to find that the bag appears only half full. The potato chip maker's machine is designed to fill bags so that the mean weight of chips in each bag is 18 ounces. A simple random sample of 32 bags produced by the machine yields a mean weight of 17.92 ounces and a standard deviation of 0.2 ounces. The distribution of bag weights is summarized in the Minitab output below: Mean StDev Min Q1 Median Q3 Max Weight 17.920 0.200 17.55 17.76 17.90 18.00 18.25 (oz) Do we have convincing evidence that the potato chip maker's machine is underfilling the bags of chips? Use the four-step process