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 ...

Probability plots are useful tools for the display and analysis of lifetime data. Refer to Abernethy (1996) for examples using probability plots in the analysis of reliability data. Probability plots ...

We investigate properties of a diagnostic-envelope method for evaluating normal probability plots of regression residuals that was proposed by Atkinson (1981), implemented by BMDP (Hardwick 1987), and ...

Probability calculations determine the chance of a specific event occurring. This calculation factors in the number of positive events with respect to the total number of possible results. When you ...

Residual plots can be used to validate assumptions about the regression model. Figure 1: Residual plots are helpful in assessments of nonlinear trends and heteroscedasticity. A formal test of lack of ...