`givitiStatCdf`

returns the cumulative density function of the
calibration statistic under the null hypothesis.

1 | ```
givitiStatCdf(t, m, devel, thres)
``` |

`t` |
The argument of the CDF. Must be a scalar value. |

`m` |
The scalar integer representing the degree of the polynomial at the end of the forward selection. |

`devel` |
A character string specifying if the model has been fit on
the same dataset under evaluation ( |

`thres` |
A numeric scalar between 0 and 1 representing the significance level adopted in the forward selection. |

A number representing the value of the CDF evaluated in t.

`givitiCalibrationBelt`

and `plot.givitiCalibrationBelt`

to compute and plot the calibaration belt, and
`givitiCalibrationTest`

to perform the
associated calibration test.

1 2 | ```
givitiStatCdf(3, 1, "external", .95)
givitiStatCdf(3, 2, "internal", .95)
``` |

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