P-value for a discrete distribution on small sample data

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Description

Computes the p-value for a two-sided hypothesis test following Dixon's (2002:145) description of the method of Agresti & Min (2001).

Usage

1
p2colasr(Z, nsim = length(Z))

Arguments

Z

vector with the observed Z-score in the first position and all the simulated values behind.

nsim

Number of simulated values.

Value

P-value of the two-sided hypothesis test

Note

This function is usually not to be called by the user. It is internally used by dixon2002.

Author(s)

Marcelino de la Cruz Rot. marcelino.delacruz@upm.es

References

Agresti, A. & Min, Y. 2001. On small-sample confidence intervals for parameters in discrete distributions. Biometrics, 57: 963-971.

Dixon, P.M. 2002. Nearest-neighbor contingency table analysis of spatial segregation for several species. Ecoscience, 9(2): 142-151.