Functions to find out constants of the relative range distribution.

These functions compute the constants d2, d3 and c4 to get estimators of the standard deviation to set control limits.

ss.cc.getd2(n = NA)

ss.cc.getd3(n = NA)

ss.cc.getc4(n = NA)

Arguments

n

Sample size

Value

A numeric value for the constant.

References

Cano, Emilio L., Moguerza, Javier M. and Redchuk, Andres. 2012. Six Sigma with R. Statistical Engineering for Process Improvement, Use R!, vol. 36. Springer, New York. https://link.springer.com/book/10.1007/978-1-4614-3652-2/.

See also

ss.cc

Author

EL Cano

Examples

ss.cc.getd2(20)
#>       d2 
#> 3.734949 
ss.cc.getd3(20)
#>        d3 
#> 0.7286908 
ss.cc.getc4(20)
#>        c4 
#> 0.9869343