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These functions are used to compute statistics required by the beta chart.
sd.beta.p(data, sizes, std.dev)
the observed data values.
sample sizes
within group standard deviation.
The function sd.beta.p returns sd the standard deviation of the statistic charted.
sd.beta.p
sd
Performs the calculation of the standard deviation sd that will be used in the construction of the control chart.
# NOT RUN { data(Drapper1998data) sd.beta.p(Drapper1998data) # }
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