surveillance (version 1.12.1)

findK: Find reference value

Description

Calculates the reference value k for a Poisson or binomial CUSUM designed to detect a shift from $\theta_0$ to $\theta_1$

Usage

findK(theta0, theta1, distr = c("poisson", "binomial"),
      roundK = FALSE, digits = 1, ...)

Arguments

theta0
in-control parameter
theta1
out-of-control parameter
distr
"poisson" or "binomial"
digits
the reference value k is rounded to digits decimal places
roundK
For discrete data and rational reference value there is only a limited set of possible values that the CUSUM can take (and therefore there is also only a limited set of ARLs). If roundK=TRUE,
...
further arguments for the distribution function, i.e. number of trials n for the binomial cdf.

Value

  • Returns reference value k.