A Random Sample of 10 Waitresses in Darwin Revealed the Following

Short Answer

A random sample of 10 waitresses in Darwin revealed the following hourly earnings (in dollars, including tips): $\begin{array}{|r|r|r|r|r|r|r|r|r|r|}\hline19&18&15&16&18&17&16&18&20&14\\\hline\end{array}$ If the hourly earnings are normally distributed with a standard deviation of $4.5, estimate with 95% confidence the mean hourly earnings for all waitresses in Darwin.