Poisson distribution: Thorndike nomogram

Thorndike nomogram is a plot by statistician Frances Thorndike that gives cumulated probabilities for different $x$ values and $\lambda$ parameters. The nomogram was published in 1926 under the title "Applications of Poisson's probability summation : an outline of the characteristics and uses of probability curves showing Poisson's exponential summation illustrated by a number of actual frequency-distributions" for the Bell Telephone Laboratories journal. Here we give an adaptation of that nomogram in two plots, both of them created with R.

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