ucl | R Documentation |
Basic formula for UCL: estimated mean + 3 * estimated standard deviation
ucl(theta_hat, n_new, factor_sd = 3)
theta_hat |
Estimate (unless known) of rate parameter theta |
n_new |
New value for exposure (reference counts), must at least be 1 |
factor_sd |
Factor multiplying standard deviation (default: 3) |
In this case, assuming a Poisson distribution, both the estimated mean and the estimated variance are lambda_hat = theta_hat * n_new.
Rounds the result to the nearest integer.
Adds 0.5, so that count values are either above or below the UCL (as in Wheeler & Chambers [1992]).
UCLs
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