1. central age = x ± y

   x: |
   y: | .
   * |

2. MSWD = m, p(χ2) = p

   m: |
   p: |

3. dispersion = x ± y

   x: |
   y: | .

Galbraith, R.F., 1988. Graphical display of estimates having differing standard errors. Technometrics, 30(3), pp.271-281.

Galbraith, R.F., 1990. The radial plot: graphical assessment of spread in ages. Nuclear Tracks and Radiation Measurements, 17(3), pp.207-214.

Galbraith, R.F., Roberts, R.G., Laslett, G.M., Yoshida, H. and Olley, J.M., 1999. Optical dating of single and multiple grains of quartz from Jinmium rock shelter, northern Australia: Part I, experimental design and statistical models. Archaeometry, 41(2), pp.339-364.