sd.beta

These functions are used to compute statistics required by the beta chart.

sd.beta(data, sizes, ...)

Arguments

data	the observed data values.
sizes	sample sizes
...	further arguments are ignored.

Value

The function sd.beta returns std.dev the standard deviation of the statistic charted.

Details

Performs the calculation of the standard deviation std.dev that will be used in the construction of the control chart.

Examples

data(Montgomery2005)
sd.beta(Montgomery2005$Defective, Montgomery2005$Sample)
#> [1] 0.421685