Description Usage Arguments Details Value Author(s) See Also

This function computes a z-score statistic for frequency counts, based on a normal approximation to the correct binomial distribution under the random sampling model.

1 |

`k` |
frequency of a type in the corpus (or an integer vector of frequencies) |

`n` |
number of tokens in the corpus, i.e. sample size (or an integer vector specifying the sizes of different samples) |

`p` |
null hypothesis, giving the assumed proportion of this type in the population (or a vector of proportions for different types and/or different populations) |

`correct` |
if |

The *z* statistic is given by

*
z := (k - np) / sqrt(n p (1-p)) *

When Yates' continuity correction is enabled, the *absolute
value* of the numerator *d := k - np* is reduced by *1/2*,
but clamped to a non-negative value.

The *z*-score corresponding to the specified data (or a vector of
*z*-scores).

Stefan Evert

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