Confidence interval for difference in means

Source: R/nice_diff_means.R

Calulates a 95 Uses an approximation to degrees of freedom of n observations - 2. Thus, may give broader confidence intervals than built in t.test() function

ci_diff_means(data, var, by)

Arguments

data

A data frame

var

A numeric variable containing the data for the calculation of the means

by

A grouping variable with only two values

Value

A numeric value for the difference in means

Examples

data(sleep)
sleep$group <- as.numeric(sleep$group)
ci_diff_means(data = sleep, var = "extra", by = "group")
#> [1] "(-3.36-0.20)"