in the past a chemical plant has produced an average of 1100 pounds of chemical per day. The records for the past year, based on 260 operating days, show the following: mean = 1060 pounds/day, standard deviation = 340 pounds/day. The interest is to test whether e average daily production has dropped significantly over the past year. Do the data provide sufficient evidence to indicate a drop in average daily product
production? Take a = 5%
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