Crack


People who work bear foot often suffer from cracks in the heel. If the cracks are severe they can cause pain, bleeding, infection etc. Many traditional remedies are in use for this ailment. In a study to test efficacy of an ayurvedic treatment, severity of cracking was recorded and also typical length of a crack. This was done for each heel before and after treatment. It is of interest to check whether the treatment is effective. This broad question can be broken down to many sub-questions, for example,  
(a) Has the severity grade remained the same for right (left) heel?
(b) Has the crack length remained the same for right (left) heel?
(c) Is the improvement in severity same for two heels?


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

Crack function

A data frame with 17 observations on the following 4 variables.
  <dl>
    <dt><code>Right_Heel_Change_Grade</code></dt><dd>Change in grade (severity) of cracking (right heel)</dd> <dt><code>Right_Heel_Change_Length</code></dt><dd>Change in typical crack length (right heel)</dd> <dt><code>Left_Heel_Change_Grade</code></dt><dd>Change in grade (severity) of cracking (left heel)</dd> <dt><code>Leftt_Heel_Change_Length</code></dt><dd>Change in typical crack length (left heel)</dd> </dl> 

Format

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

Crack: Healing the heel

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Examples