se_diff_means: Standard error for difference in means

In simonthelwall/nicethings: Nicely formats things for printing inline in Rmarkdown documents and other nice things

Standard error for difference in means

Description

Calculates the standard error for the difference in means between two groups

Usage

se_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)
se_diff_means(data = sleep, var = "extra", by = "group")

# confirming against Kirkwood and Sterne
dat <- data.frame(weight = c(3.18, 2.74, 2.90, 3.27, 3.65, 3.42, 3.23, 2.86,
                               3.6, 3.65, 3.69, 3.53, 2.38, 2.34, 3.99, 3.89,
                               3.60, 3.73, 3.31, 3.7, 4.08, 3.61, 3.83, 3.41,
                               4.13, 3.36, 3.54, 3.51, 2.71),
                    group = c(rep(1, 14), rep(0, 15)))
se_diff_means(data = dat, var = "weight", by = "group")

simonthelwall/nicethings documentation built on Feb. 27, 2023, 3:15 p.m.