This illustrates the result of selection against **small** gall size. The trend in the mean would be in the
opposite direction if the selection was against **large** gall size, while the trends in the variances would
be similar.

Entire sample of galls | Mean = 18.71 mm Variance = 9.70 |

After 50% of galls < 16 mm are parasitized |
Mean = 19.20 mm Variance = 7.68 |

After 100% of galls < 16 mm are parasitized |
Mean = 19.82 mm Variance = 5.44 |