sd.beta.p

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

sd.beta.p(data, sizes, std.dev)

Arguments

data	the observed data values.
sizes	sample sizes
std.dev	within group standard deviation.

Value

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

Details

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

Examples

data(Drapper1998data)
sd.beta.p(Drapper1998data)
#>              PROP
#> PROP 0.0009362578