When you request a lognormal probability plot, you must specify the shape parameter for the lognormal distribution (see Table 9.13 for the equation). The value of must be positive, and typical values ...

Journal of the Royal Statistical Society. Series D (The Statistician), Vol. 31, No. 3 (Sep., 1982), pp. 211-220 (10 pages) Probability plots are often used to examine whether a sample comes from some ...

Largely for pedagogical purposes, the authors have plotted two sets of curves which permit one to observe how the non-centrality parameter affects the shape of the non-central t-distribution. In one ...