Welch's T-Test Calculator

Compare the means of two independent groups with unequal variances. Ideal for revenue-per-visitor, average order value, and other continuous metrics.

Metric

Metric name

Symbol / prefix

Test type

Two-tailed (did the variant change the metric in either direction?) One-tailed (did the variant increase the metric?)

Group A

Mean

Standard deviation

Sample size (n)

Group B

Mean

Standard deviation

Sample size (n)