z-test

noun
\ˈzē-ˌtest \

Definition of z-test 

: any of several statistical tests that use a random variable having a z distribution to test hypotheses about the mean of a population based on a single sample or about the difference between the means of two populations based on a sample from each when the standard deviations of the populations are known or to test hypotheses about the proportion of successes in a single sample or the difference between the proportion of successes in two samples when the standard deviations are estimated from the sample data

First Known Use of z-test

1951, in the meaning defined above

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Dictionary Entries near z-test

Zr

z-score

ZT

z-test

Z-twist

Zu'l-Hijja

Zu'l-Kadah

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The first known use of z-test was in 1951

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