State inspectors, investigating charges that a Louisiana soft-drink bottling company underfills its product, have sampled 200 bottles and found the average contents to be 31.7 fluid ounces. The bottles are advertised to contain 32 fluid ounces. The population standard deviation is known to be 1.5 fluid ounces. Should the inspectors conclude, at the 2 percent significance level, that the bottles are being underfilled?
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