Conduct a Tukey Multiple Comparison

Essay

Conduct a Tukey multiple comparison. Display the confidence intervals in a table. State which population means can bedeclared different.
-Perform a Tukey multiple comparison to compare the breaking strengths of four different kinds of thread. Use a 95% family confidence level. Independent random samples of the four different kinds of thread yielded the following breaking strengths in ounces. $$\begin{array} { c | c | c | c } \text { Thread A } & \text { Thread B } & \text { Thread C } & \text { Thread D } \\ \hline 14 & 18 & 21 & 19 \\ 16 & 19 & 22 & 17 \\ 16 & 19 & 21 & 18 \\ 15 & 20 & 23 & 19 \\ 15 & & 23 & \end{array}$$