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.

Question

Quizplus · Accepted Answer

The Answer of 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.

A Random Sample of 10 Waitresses in Darwin Revealed the Following