This function calculates the confidence interval (for a given confidence level) for a variable in a given data frame.
Arguments
- df
data frame to read in.
- var1
the variable of interest for which the CI will be calculated.
- cl
the desired confidence level (in percentages, ranging from \(1\) to \(100\)).
Value
This function returns the mean, lower bound, upper bound, and standard error.
Examples
data <- mtcars
ci.calc(data,mpg,95)
#> Mean CI lower CI upper Std. Error
#> 20.090625 18.002394 22.178856 1.065424
