Containers of a Certain Treatment for Septic Tanks Are Supposed

question 56

Essay

Containers of a certain treatment for septic tanks are supposed to contain 16 oz of liquid. A sample of five containers is selected from the production line once each hour and the sample average content is determined. Consider the following results: $$\begin{array} { c c c c c c c c } 15.993 & 16.052 & 16.067 & 15.913 & 16.031 & 16.061 & 15.983 & 15.900 \\16.039 & 16.075 & 16.040 & 15.936 & 16.033 & 15.961 & 16.056 &\end{array}$$ Using $$\Delta$$ = .10 and h = .20, employ the computational form of the CUSUM procedure to investigate the behavior of this process.