Question: The U.S. Census Bureau reports that the average number of employees in a small business is 16.1. Suppose a sample of 49 small businesses showed a mean of 15 employees, with a standard deviation of 25. Test whether the population mean number of employees in a small business is different from 16.1, using level of significance  \(\alpha \) = 0.01.

Test using both the critical value (traditional) approach and the p-value approach .  Next, use the confidence interval approach to test (at significance level α = 0.01) whether the population mean number of employees in a small business is different from 16.1.

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