Example 2.12 Exploring Data with Pivot Tables

| 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | OTIS3.XLS n Lists the diameters (in inches) of elevator rails produced by Otis Elevator’s two machines and two operators. Each diameter corresponds to a particular machine/operator combination. A portion of the data is shown on the following slide n What effects, if any, do the operator and machine have on elevator rail diameters?

| 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | Data

| 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | Creating the Pivot Table n We created the pivot table for this example as follows: – Drag Machine to the row area – Operator to the column area – Diameter to the data area - summarize by average n The following is the resulting pivot table and 3-D column chart.

| 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | The Pivot Table and Chart

| 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | Analyzing the Results n The numbers and graph indicate several interesting results. n On average, the diameters on machine 2 are about 0.01 inch larger than those for machine 1. n On average, the diameters for operator 2 are about 0.01 inch larger than those for operator 1.

| 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | Additional Pivot Table Options n Importing data from an external database n We can use a “page” field for added flexibility. This will be explored in the next chapter. n We can drag multiple field to any of he areas. Also, fields can be dragged around without going back to the wizard. The Pivot Table automatically adjusts itself.

| 2.2 | 2.3 | 2.4 | 2.5 | 2.6 | 2.7 | 2.8 | 2.9 | 2.10 | Additional Options -- continued n By double-clicking on any pivot table entry we can see all of the data that were used to computer the entry. n The pivot table retains a link to the original data, so that if the original data change, the pivot table recalculates automatically. To refresh the data, click on the exclamation point on the PivotTable toolbar.