Performs one or two samples t-test
rquery.t.test(x, y = NULL, paired = FALSE, graph = TRUE, ...)a (non-empty) numeric vector of data values.
an optional (non-empty) numeric vector of data values
: if TRUE, paired t-test is performed
: if TRUE, the distribution of the data is shown for the inspection of normality
: further arguments to be passed to the built-in t.test() R function
Returns t-test results
1. shapiro.test is used to check normality 2. F-test is performed to check equality of variances If the variances are different, then Welch t-test is used