ci_t2: Confidence interval for difference of the mean between 2...

In maxgav13/GMisc: Miscellaneous Functions for Geology (and its areas)

Confidence interval for difference of the mean between 2 samples (unknown sigmas)

Description

Calculates the confidence interval for the difference of the mean between 2 samples (t distribution).

Usage

ci_t2(x1, s1, n1, x2, s2, n2, var.equal = FALSE, conf.level = 0.95, digits = 2)

Arguments

x1	Sample's 1 mean
s1	Sample's 1 standard deviation
n1	Sample size of sample 1
x2	Sample's 2 mean
s2	Sample's 2 standard deviation
n2	Sample size of sample 2
var.equal	Logical indicating if the variances are equal or not
conf.level	Confidence level to use for the confidence interval (Default is 0.95)
digits	Number of digits to round to (Default is 2)

Value

A tibble with the difference of means, degrees of freedom, and lower and upper ends of the confidence interval

Examples

x1 <- 90
s1 <- 15
n1 <- 20
x2 <- 80
s2 <- 8
n2 <- 30
ci_t2(x1, s1, n1, x2, s2, n2)

maxgav13/GMisc documentation built on June 12, 2022, 3:48 a.m.