One-sample or two-sample t-test. This function is a wrapper for
svymean
in the one-sample case and for
svyglm
in the two-sample case. Degrees of freedom are
degf(design)-1
for the one-sample test and degf(design)-2
for the two-sample case.
svyttest(formula, design, ...)
Formula, outcome~group
for two-sample,
outcome~0
or outcome~1
for one-sample. The group
variable
must be a factor or character with two levels, or be coded 0/1 or 1/2
survey design object
for methods
Object of class htest
# NOT RUN { data(api) dclus2<-svydesign(id=~dnum+snum, fpc=~fpc1+fpc2, data=apiclus2) tt<-svyttest(enroll~comp.imp, dclus2) tt confint(tt, level=0.9) svyttest(enroll~I(stype=="E"),dclus2) svyttest(I(api00-api99)~0, dclus2) # }
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