Description Usage Arguments Value Author(s) References See Also

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

1 2 3 |

`data` |
the observed data values |

`center` |
sample/group center statistic. |

`sizes` |
samples sizes. |

`std.dev` |
within group standard deviation. |

`conf` |
a numeric value used to compute control limits, specifying the number of standard deviations (if |

`...` |
further arguments are ignored. |

The function `stats.p`

returns a list with components `statistics`

and `center`

.

The function `sd.p`

returns `std.dev`

the standard deviation of the statistic charted.

The function `limits.p`

returns a matrix with lower and upper control limits.

Luca Scrucca

Montgomery, D.C. (2005) *Introduction to Statistical Quality Control*, 5th ed. New York: John Wiley & Sons.

Wetherill, G.B. and Brown, D.W. (1991) *Statistical Process Control*. New York: Chapman & Hall.

qcc documentation built on July 11, 2017, 9:05 a.m.

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