Students (# = 5) | Adults (# = 5) | ||

Group A + B | Mean hit rate (# of answered pairs/40 × 5) | 0.705 (141/200) | 0.780 (156/200) |

(2834 words) | Estimated density ${p}_{A+B}$ | 0.1149 | 0.1405 |

[# of each type in answered pairs] | AA = 30, AB = 67, BB = 44 | AA = 32, AB = 66, BB = 58 | |

Group B | Mean hit rate (# of answered pairs/40 × 5) | 0.550 (110/200) | 0.800 (160/200) |

(1744 words) | Estimated density ${p}_{BB}$ | 0.0767 | 0.1487 |