A wrapper for t.test
which includes the original data in the returned
object.
1 2 3 4 5 6 7 8 9 
x 
a (nonempty) numeric vector of data values. 
... 
further arguments to be passed to or from methods. 
y 
an optional (nonempty) numeric vector of data values. 
alternative 
a character string specifying the alternative
hypothesis, must be one of 
mu 
a number indicating the true value of the mean (or difference in means if you are performing a two sample test). 
paired 
a logical indicating whether you want a paired ttest. 
var.equal 
a logical variable indicating whether to treat the
two variances as being equal. If 
conf.level 
confidence level of the interval. 
formula 
a formula of the form 
data 
an optional matrix or data frame (or similar: see

subset 
an optional vector specifying a subset of observations to be used. 
na.action 
a function which indicates what should happen when
the data contain 
t.test
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