Calculate Confidence Interval

Calculate the confidence interval of a given sample mean.

conf_int(x, ci = 0.95, r = NA, s = NA, se = NA, n = NA)

Arguments

x

A sample mean

ci

Numeric, confidence level (default = 0.95)

r

Numeric, reliability coefficient (default = NA)

s

Numeric, standard deviation of population (default = NA)

se

Numeric, standard error of the sample mean (default = s * sqrt(1 - r))

n

Numeric, sample size (default = NA)

Value

A list containing confidence intervals from Z and t methods.

Examples

conf_int(x = 12, ci = 0.99, s = 2.5, n = 24)
#> Confidence intervalls
#> 
#> $`Z based confidence interval`
#>     0.5%    99.5% 
#> 10.68553 13.31447 
#> 
#> $`t based confidence interval`
#>     0.5%    99.5% 
#> 10.56739 13.43261 
#> 
conf_int(x = 12, s = 2.5, r = 0.6)
#> Confidence intervalls
#> 
#> $`Z based confidence interval`
#>      2.5%     97.5% 
#>  8.901025 15.098975 
#> 
#> $`t based confidence interval`
#> [1] NA
#>