One-sample t-test

Compute the mean of a sample and the corresponding confidence interval, using Student's t distribution. Optionally, compute a p-value for a specified null hypothesis.

Usage

one_t_inference(
  formula,
  data,
  alternative = c("two.sided", "less", "greater"),
  null,
  conf.level = 0.95,
  backtransform = TRUE
)

Arguments

formula

a formula of the form ~ y or y ~ 1, where y is a numeric variable. To perform test within subgroups, use y ~ x or y ~ 1 | g, or even y ~ x | g, where x and g are factor variables.

data

a data frame containing the values in the formula.

alternative

character string specifying the alternative hypothesis, must be one of "two.sided" (default), "greater" or "less".

null

a number specifying the null proportion for testing a null hypothesis; if not specified, no hypothesis test is performed.

conf.level

confidence level of the returned confidence interval. Must be a single number between 0 and 1.

backtransform

if response variable is of form log(...), backtransform the resulting estimate and confidence interval bounds.