This function estimates the population proportion by group testing using maximum likelihood method. It is for both equal and unequal group size.

1 | ```
p.mle(obs)
``` |

`obs` |
A three-column matrix containing all the data information. Column 1 is the number of groups. Column 2 is group size. Column 3 is number of positives. Different rows corresponds to different group sizes. |

The maximum likelihood estimate for population proportion by group testing

Qingyang Zhang, Yanchuan Li

Ayung, J. (2003) Tutorial on maximum likelihood estimation. Journal of Mathematical Psychology. 47(1). <http://www.sciencedirect.com/science/article/pii/S0022249602000287>

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