This data set contains the ratio of "forehead" breadth to body length for 1000 crabs sampled at Naples by Professor W.F.R. Weldon. Pearson (1894) used a two component normal mixture model to fit this data set. The data frame has 29 rows and 2 columns.
This data frame contains the following columns:
ratio: the boundaries of grouping intervals.
freq: the frequencies of observation falling into each interval.
Pearson K (1894). Contributions to the mathematical theory of evolution. Philosophical Transactions of the Royal Society of London. A, 185, 71–110.
1 2 3
$`PMLE of mixing proportions`  0.441 0.559 $`PMLE of means`  0.634 0.657 $`PMLE of variances`  0.000339 0.000158 $`log-likelihood`  2567.577 $`Penalized log-likelihood`  2566.177
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