OptionalalternativeAlternative hypothesis: "two.sided", "less" or "greater". Default "two.sided".
Unambiguous abbreviations such as "two", "l" and "g" are accepted, as in R.
OptionalconfConfidence level of the interval. Default 0.95.
OptionalmuTrue mean under the null hypothesis (difference in means for two samples). Default 0.
OptionalpairedPaired t-test on x - y (pairs with NaN are dropped). Requires y. Default false.
OptionalvarAssume equal variances and use the pooled variance. Default false (Welch's test).
Options for tTest.