Sheeplife


In biology often it is of interest to describe life span of an organism. Parametric approach to this problem involves fitting a given probability distribution. Common distributions used here are exponential, Weibul and Gamma. Occasionally other distributions such as inverse Gaussian, log-normal distribution etc. are also fitted. 
	The data refer to age at death of a species of sheep. Age was estimated using skulls. 
	In case of the above data usual distributions failed to give a good fit. There is considerable improvement by using, instead, a quadratic hazard function.


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

Sheeplife function

A data frame with 11 observations on the following 2 variables.
  <dl>
    <dt><code>Age_at_death</code></dt><dd>Age at death (years)</dd> <dt><code>Frequency</code></dt><dd>Frequency</dd> </dl> 

Format

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

Sheeplife: Fitting probability distribution to life data of Sheeps

Description

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Details