z distribution

noun

Definition of z distribution

: 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

First Known Use of z distribution

1968, in the meaning defined above

Keep scrolling for more

Learn More About z distribution

Time Traveler for z distribution

Time Traveler

The first known use of z distribution was in 1968

See more words from the same year

Dictionary Entries Near z distribution

Z chromosome

z-coordinate

Zdarsky tent

z distribution

zdravets oil

zea

zeal

See More Nearby Entries 

Statistics for z distribution

Cite this Entry

“Z distribution.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/z%20distribution. Accessed 24 Jun. 2021.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

WORD OF THE DAY

Test Your Vocabulary

Return of Name that Color!

  • a light greenish blue color
  • Name that color:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Universal Daily Crossword

A daily challenge for crossword fanatics.

TAKE THE QUIZ
Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!