1. concordia age = τ ± x | y | z

   τ: |
   x: |
   y: |
   z: |

2. MSWD = u | v | w, p(χ2) = x | y | z

   u: |
   v: |
   w: |
   x: |
   y: |
   z: |

Legend:

1. lower intercept = τ ± x | y | z
   upper intercept = τ ± x | y | z
   age = τ ± x | y | z
   (207Pb/206Pb)o = τ ± x | y | z
   (206Pb/204Pb)o = τ ± x | y | z
   (207Pb/204Pb)o = τ ± x | y | z
   (208Pb/206Pb)o = τ ± x | y | z
   (208Pb/206Pb)o = τ ± x | y | z

   τ: |
   x: |
   y: |
   z: |

2. MSWD = u, p(χ2) = v

   u: |
   v: |

3. overdispersion = ω + u /- l Ma

   ω: |
   u: |
   l: |

Ludwig, K.R., 1998. On the treatment of concordant uranium-lead ages. Geochimica et Cosmochimica Acta, 62(4), pp.665-676.