False Alarm probability for the 3-sigma R chart.

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Description

Used to calculate the real probability of false alarm in the 3-sigma R chart.

Usage

1

Arguments

n

The sample size.

Details

This alpha risk is calculated under the exact R statistics distribution and its values for small sample sizes will be much larger than the reference value 0,0027.

Value

Return the value of the alpha risk for a given sample size n.

Author(s)

Daniela R. Recchia, Emanuel P. Barbosa

See Also

d2,d3,c4

Examples

1