Scenario: Let’s continue our analysis of the Pipeline Safety data. Before performing any further analysis, we first need to sort the data chronologically.

Select Tables  Sort. Select the columns IDATE and IHOUR and click OK. This opens a new data table with the rows in the proper sequence.

a. Create one or more control charts to examine variation in the STMin (time required to restore the site to safety), using samples of 8 observations by IREGION. Report on what you find.

b. Create one or more control charts to examine variation in the Prpty (dollar estimate of property damage), using samples of 8 observations by IREGION.

Report on what you find.