Plaque


Accumulation of plaque on teeth is a major cause of dental ill health. Producers of toothpaste often claim that use of their product will reduce the plaque. Data on three products are to be used to check two things (a) does a particular product reduce plaque? (b) Is reduction achieved the same for all products? 


datasets

Collection of datasets as prepared by Profs. A.P. Gore, S.A. Paranjape, and M.B. Kulkarni of Department of Statistics, Poona University, India. With their permission, first letter of their names forms the name of this package, the package has been built by me and made available for the benefit of R users. This collection requires a rich class of models and can be a very useful building block for a beginner.

Prabhanjan Tattar

100 Data Sets for Statistics Education

Plaque function

A data frame with 60 observations on the following 3 variables.
  <dl>
    <dt><code>Product</code></dt><dd>The product</dd> <dt><code>Before</code></dt><dd>Plaque score before treatment </dd> <dt><code>After</code></dt><dd>Plaque score AFTER treatment</dd> </dl> 

Format

http://ces.iisc.ernet.in/hpg/nvjoshi/statspunedatabook/databook.html

Plaque: Studying effect of toothpaste on plaque accumulation

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