α | β | γ̅ | σ_{γ} | γ̅_{approx} | γ̅_{normal} |
---|---|---|---|---|---|

∞ | 0 | 2.50 | 0.00 | 2.50 | 2.50 |

20 | 0.13 | 2.57 | 0.56 | 2.59 | 2.60 |

10 | 0.26 | 2.64 | 0.84 | 2.72 | 2.65 |

5 | 0.56 | 2.82 | 1.26 | 3.02 | 2.87 |

2 | 1.85 | 3.71 | 2.62 | 4.19 | — |

1 | 4.79 | 4.79 | 4.79 | 5.55 | — |

0.5 | 23.00 | 11.30 | 16.30 | 8.38 | — |

The first four columns relate to a gamma distribution of the scaled selection intensity γ; the fifth gives the estimate of mean γ obtained for a general distribution from the second-order Taylor series approximation, with the same variance as the gamma distribution; the sixth is the estimate for a normal distribution with this variance. See text for further details.