A cigarette manufacturer claims that his cigarettes have an average nicotine content of only 1.83

milligrams. To verify his claim, a sample of 8 cigarettes are tested and were found to have a nicotine content of 2.0, 1.7, 2.1, 1.9, 2.2, 2.1, 2.0 and

1.6 milligrams with standard deviation 0.21. At 5%

level of significance, would you accept the

manufacturer's claim?