z distribution

noun

: a probability density function and especially a normal distribution that has a mean equal to zero and a standard deviation equal to one and that is used especially in testing hypotheses about means or proportions of samples drawn from populations whose population standard deviations are known compare z-test

Word History

First Known Use

1968, in the meaning defined above

Time Traveler
The first known use of z distribution was in 1968

Dictionary Entries Near z distribution

Cite this Entry

“Z distribution.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/z%20distribution. Accessed 25 Nov. 2024.

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