Statistics · inference

Mean Confidence Interval Formula

Gives a t-based confidence-interval form for a population mean.

x̄ ± t* (s / √n)

Variables

x̄: sample mean
t*: critical value
s: sample standard deviation
n: sample size

Conditions

Choose t* for the intended confidence level and degrees of freedom.

Reference details

Subject: Statistics
Topic: inference
Plain text: x-bar +/- t* (s/sqrt(n))