Plastic tensile strength data

A materials engineer at a plastic manufacturing company wants to increase the tensile strength of a plastic product. The engineer identifies several factors to evaluate as possible contributors to tensile strength, including processing temperature, additive, agitation rate, and processing time. Because the temperature of the processing oven is difficult to change, the engineer designs a split-plot full factorial experiment so that the temperature is held constant while the other factors vary for each temperature setting.

You can use this data to demonstrate Analyze Factorial Design for a split-plot design.

Worksheet column	Description
StdOrder	The order of the runs in standard order (also called Yates order).
RunOrder	The order of the runs in random order.
PtType	The point type. This design has only corner points (1).
Blocks	The blocks. In this design, all the design points are contained in a single block.
WP	The whole plot indicator: 1, 2, 3, or 4.
Temp[HTC]	The temperature: -1 or 1 (hard-to-change factor).
Add	The additive percent: -1 or 1 (factor).
Rate	The agitation rate: -1 or 1 (factor).
Time	The processing time: -1 or 1 (factor).
Strength	The strength of the plastic (response).

Download PlasticTensileStrength.MTW