Surface Plot
Poisson Regression
Summary
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Surface Plot
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Use Minitab's surface plot to help you visualize the effects of continuous variables. This plot shows how a response variable relates to two continuous variables based on a model equation while any additional variables are held constant.
These plots are useful for establishing desirable response values and operating conditions.
Data Description |
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A manufacturer produces molded resin parts. Contamination in hoses and abrasions to resin pellets can lead to discolored streaks in the final product. Higher temperatures and faster rates of transfer can cause pellets to clump together. Clumps can be difficult to move through hoses and into molds. The company collects data on the number of defects per hour.
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Column |
Name |
Description |
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C1 |
Size of Screw |
The large screw moves resin pellets through transfer hoses faster. |
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C2 |
Hours Since Cleanse |
The time since workers cleaned the hoses. |
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C3 |
Temperature |
The temperature around the pellets during transfer. |
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C4 |
Discoloration defects |
The number of discolored streaks in the batch of final products. |
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C5 |
Clump defects |
The number of clumps of pellets so large as to be defects. |
Data: ResinDefects.MTW (available in the Sample Data folder).
Free online chart generators for statistical analysis:
Useful tools:
