powstrattest {recapr} | R Documentation |
Power of Consistency Tests, Complete Stratification
Description
Conducts power calculations of the chi-squared tests for the consistency of the Petersen-type abundance estimator, in a complete stratification setting.
Usage
powstrattest(N, n1, n2, alpha = 0.05, sim = TRUE, nsim = 1e+05)
Arguments
N |
Vector of total abundance, with each element corresponding to one stratum. |
n1 |
Vector of anticipated n1 counts (sample size in the first event), each element corresponding to one stratum. |
n2 |
Vector of anticipated n2 counts (sample size in the second event), each element corresponding to one stratum. |
alpha |
Significance level for testing. Defaults to |
sim |
Whether to conduct power calculation by simulation as well as
Cohen's method. Defaults to |
nsim |
Number of simulations if |
Value
A list of three elements, each with class "recapr_stratpow"
with the following components:
prob
A vector of capture probabilities corresponding to the alternative hypothesis investigatedprob_null
A vector of capture probabilities corresponding to the null hypothesis (all probabilities equal)n
The sample size used for the testalpha
The significance level used for testingpower
The test power, calculated by Cohen's methodpower_sim
The test power, calculated via simulation
Author(s)
Matt Tyers
References
Cohen, J. (1988). Statistical power analysis for the behavioral sciences (2nd ed.). Hillsdale,NJ: Lawrence Erlbaum.
Code adapted from the 'pwr' package: Stephane Champely (2015). pwr: Basic Functions for Power Analysis. R package version 1.1-3. https://CRAN.R-project.org/package=pwr
See Also
Examples
powstrattest(N=c(10000,20000), n1=c(1000,2000), n2=c(200,200))