UBCR estimator |

UBDP test |

ultimate cluster |

ultrametric inequality |

UMP test |

UNē test |

unadjusted moment |

unbiased confidence intervals |

unbiased critical region |

unbiased error |

unbiased estimating equation |

unbiased estimator |

unbiased minimum variance estimator |

unbiased sample |

unbiased test |

underdispersion |

unequal subclasses |

uniform distribution |

uniform sampling fraction |

uniform scores test |

uniform spectrum |

uniformity trial |

uniformly best constant risk estimator |

uniformly best distance power test |

uniformly better decision function |

uniformly minimum risk |

uniformly most accurate |

uniformly most powerful test |

uniformly unbiased estimator |

unimodal |

union-intersection principle |

union-intersection tests |

unique factor |

uniqueness |

unit normal random variable |

unit stage sampling |

unitary sampling |

unitemporal model |

univariate distribution |

universe |

unlikelihood ratio |

unobserved confounder |

unreduced designs |

unreliability |

unrestricted random sample |

unweighted mean |

unweighted means method (in analysis of variance) |

up and down method |

up cross |

upper control limit |

upper quartile |

upward bias |

urn model |

U-shaped distribution |

Uspensky's inequality |

U-statistic |

U-test |

utility theory |