noun
Z-test
A statistical hypothesis test that uses the standard normal distribution. Used in mathematics and statistics.
このデータにはＺ検定を適用して平均の差を調べた。
We applied a Z-test to this data to examine the difference in means.
t-test; used when the population variance is unknown or the sample size is small, unlike the Z-test which assumes known variance or large samples.
From English 'Z-test', where Z refers to the standard normal distribution (Z-distribution).