RVAideMemoire (version 0.9-6)

chisq.exp: Expected counts for comparison of proportions to theoretical values

Description

Return expected counts before comparing proportions to theoretical values by chi2 test.

Usage

chisq.exp(data, p, graph = FALSE)

Arguments

data

contingency table.

p

theoretical proportions.

graph

logical. If TRUE a mosaic plot of expected counts is drawn.

Value

• p.theo
  theoretical proportions.
• mat
  contingency table of expected counts.
• cochran
  number of counts which can be inferior or egal to 5.

Details

The function returns how many counts can be inferior or egal to 5 to respect Cochran's rule (80 % of counts must be inferior or egal to 5).

See Also

prop.test, chisq.test, mosaicplot

Examples

proportions<-sample(c(0,1),60,replace=TRUE)
populations<-sample(LETTERS[1:3],60,replace=TRUE)
tab.cont<-table(populations,proportions)
p.theo<-c(0.2,0.5,0.7)
chisq.exp(tab.cont,p=p.theo)