The Effects of Brand of Paper Towel and Liquid on Absorbency

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The Effects of Brand of Paper Towel and Liquid on
Absorbency Math 321 Rickie J. Domangue Fall
2009 December 2, 2009
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• Research Questions
• Does the brand of paper towel have an effect on
  the amount of liquid absorbed?
• Does the type of liquid have an effect on the
  amount of the liquid absorbed?
• Does the effect of the paper towel on
  absorbency depend on the type of liquid?

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Factors Brand of Paper Towel (Coronet,
Kleenex, Scott) Type of Liquid (Water,
Dishwashing Detergent, Vegetable
Oil Treatments Combinations of Brand of
Paper Towel and Type
of Liquid Response Variable Amount of Liquid
Absorbed (mL)
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Experimental Design Completely Randomized
Design Experimental Units Time Slots

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Statistical Methods ANOVA for Two Factor
Completely Randomized Design -
0.10 level of significance used for test of
Interaction - 0.05 level of
significance used for test of brand
and liquid effects Tukey Confidence
Intervals for Pairwise Comparisons -
95 simultaneous confidence level Software SAS
Version 7.7
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• Experimental Procedure
• Location R Domangues house
• Etc.

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Amount of Liquid Absorbed (mL) by Brand and
Liquid
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Sample Means (Standard Deviations)
Amount Absorbed (mL)
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ANOVA Table
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Residual Plots for Checking Model
Assumptions
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Conclusions