Hello,
Without a data example I can't test this but, the call to ?z.test seems
to be wrong, you are passing a value for argument 'mu' equal to sd(m)
but _not_ passing a value for argument 'stdev'. Try
kzt <- sapply(Sep, function(m) z.test(m, stdev = sd(m)))
Hope this helps,
Rui Barradas
Em 17-10-2012 07:45, Balqis escreveu:
Hi!
I'm trying to use sapply to my dataframe for z.test function (teaching
demos package)
Sep=cbind(kIp,k02p,k04p,k07p)
Sep=as.data.frame(Sep)
kzt=sapply(Sep, function(m) z.test(m,sd(m)))
Error in z.test(m, sd(Sep)) :
You must specify a Standard Deviation of the population
kzt=sapply(Sep, function(m) z.test(m,sd(Sep)))
Error in z.test(m, sd(Sep)) :
You must specify a Standard Deviation of the population
#obviously it can't process the z.test because of the sd function embedded
inside the function. can someone point me how to fix this. Many thanks!
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