ChisqSimSlow: Chi Square Resampler (One at a Time)
Description
An app to illustrate use of the chi-square statistic to test
for a relationship between two categorical variables. The P-value is computed
by resampling, and the resamples are done one at a time. A histogram of resampled chi-square statistics is displayed
after each resample, and summary information is output to the
console.
a formula of the form ~x+y. When using
fixed effects (see below for explanation), x should be the
variable that is considered the predictor variable.
data
A data frame from which x and y are drawn.
effects
When effects="fixed", the resampling is performed under
the conditon that the row sums in the resampled two-way table (with x
for rows) are the same as the row sums in the twoway table based on the
original data. When effects="random", then both row and column sums
in the resampled table may vary: only the sum of the counts is
constant. (Note: in the resampling procedure for chisq.test
in the stats package of R, both row and column sums are
required to equal the corresponding sums for the original data.)