Description Usage Arguments Value
A two-sided confidence interval with a known variance
1 | z_ci_sigma(mu, xbar, confidenceLevel, variance, n)
|
mu |
(what we believe to be) the true population mean |
xbar |
the sample mean of the data |
confidenceLevel |
the significance level for the CI, i.e., 1 - alpha |
variance |
the *known* variance of the data |
n |
the number of data entries |
returns a test statistic, a p-value, and a confidence interval consisting of lower and upper bounds
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