Testing Two Locations

Section 6 Charts for Multiple Locations

Lesson S06-04

Text: Section 6 pages 22 – 36

Duration: 16 minutes

Testing Two Locations

In the example just completed, the need for the d chart was obvious because a simple chart of the three locations demonstrated a significant difference between the locations.

An obvious discrepancy between locations is often not apparent. In many situations, an objective test is required to determine whether location to location differences exist.

The appropriate statistical methods to test for significant differences between locations are a Paired t-Test or an ANOVA (2-way)

The use of Paired t-Test is covered next.

S or d Chart

Paired t-Test

An Example

Paired t-Test Background