# qqtest: Self Calibrating Quantile-Quantile Plots for Visual Testing

Provides the function qqtest which incorporates uncertainty in its qqplot display(s) so that the user might have a better sense of the evidence against the specified distributional hypothesis. qqtest draws a quantile quantile plot for visually assessing whether the data come from a test distribution that has been defined in one of many ways. The vertical axis plots the data quantiles, the horizontal those of a test distribution. The default behaviour generates 1000 samples from the test distribution and overlays the plot with shaded pointwise interval estimates for the ordered quantiles from the test distribution. A small number of independently generated exemplar quantile plots can also be overlaid. Both the interval estimates and the exemplars provide different comparative information to assess the evidence provided by the qqplot for or against the hypothesis that the data come from the test distribution (default is normal or gaussian). Finally, a visual test of significance (a lineup plot) can also be displayed to test the null hypothesis that the data come from the test distribution.

- Author
- Wayne Oldford [aut, cre]
- Date of publication
- 2016-02-25 00:32:10
- Maintainer
- Wayne Oldford <rwoldford@uwaterloo.ca>
- License
- GPL-3
- Version
- 1.1.1

## Man pages

- bacteria
- Bacteria from Delaware River water entering the Torresdale...
- dkay
- 'dkay' The density function of the K distribution
- penicillin
- 31 contrast sums from a 32 run 2^(5-0) factorial experiment...
- pkay
- 'pkay' The cumulative distribution function K distribution
- primer
- Automobile primer paint thickness quality control...
- pullstrength
- Strength of pull for 519 males aged 23-26.
- qkay
- 'qkay' The K distribution quantile function
- qqtest
- 'qqtest' A self-calibrated quantile-quantile plot for...
- rkay
- 'rkay' The K distribution - generating pseudo-random values
- sittingHeights
- Sitting height in inches of female adults (aged 23-50).
- stacklossDistances
- Mahalanobis squared distances of Brownlee's stack loss plant...
- WachusettReservoir
- Storage, in millions of gallons daily per square mile of net...

## Files in this package

qqtest |

qqtest/NAMESPACE |

qqtest/data |

qqtest/data/bacteria.rda |

qqtest/data/pullstrength.rda |

qqtest/data/primer.rda |

qqtest/data/sittingHeights.rda |

qqtest/data/WachusettReservoir.rda |

qqtest/data/stacklossDistances.rda |

qqtest/data/penicillin.rda |

qqtest/R |

qqtest/R/stacklossDistances.R |

qqtest/R/sittingHeights.R |

qqtest/R/WachusettReservoir.R |

qqtest/R/pullstrength.R |

qqtest/R/dkay.R |

qqtest/R/qkay.R |

qqtest/R/pkay.R |

qqtest/R/primer.R |

qqtest/R/bacteria.R |

qqtest/R/qqtest.R |

qqtest/R/rkay.R |

qqtest/R/penicillin.R |

qqtest/MD5 |

qqtest/DESCRIPTION |

qqtest/man |

qqtest/man/WachusettReservoir.Rd |

qqtest/man/qkay.Rd |

qqtest/man/qqtest.Rd |

qqtest/man/penicillin.Rd |

qqtest/man/pkay.Rd |

qqtest/man/sittingHeights.Rd |

qqtest/man/dkay.Rd |

qqtest/man/bacteria.Rd |

qqtest/man/pullstrength.Rd |

qqtest/man/primer.Rd |

qqtest/man/stacklossDistances.Rd |

qqtest/man/rkay.Rd |