ci_z | R Documentation |
Calculates the confidence interval for the mean with known standard deviation, using the Z-statistic (normal distribution).
ci_z(x, sig, n, conf.level = 0.95, digits = 2)
x |
Sample mean |
sig |
Population standard deviation |
n |
Sample size |
conf.level |
Confidence level to use for the confidence interval (Default is 0.95) |
digits |
Number of digits to round to (Default is 2) |
A tibble with the mean, and lower and upper ends of the confidence interval
x <- 80 sig <- 15 n <- 20 ci_z(x, sig, n)
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