Z-Test - Definition

The term "statistical Analysis system" is used to refer to software that allows the user to perform statistical analysis on data sets. Another commonly-used term for this type of software is statistical programming language. When capitalized, Statistical Analysis System (SAS) is also the proper name of one of the most well-known software packages of this type.

A Z-test is any statistical test for which the distribution of the test statistic under the null hypothesis can be approximated by a normal distribution. Due to the central limit theorem, many test statistics are approximately normally distributed for large samples. Therefore, many statistical tests can be performed as approximate Z-tests if the sample size is not too small.

The term Z-test is often used to refer specifically to the one-sample location test comparing the mean of a set of measurements to a given constant.

Terms near "Z-Test"

Z-Tranche

Zacks Investment Research

ZAR

Zero Balance Account (ZBA)

Zero Basis Risk Swap (ZEBRA)

Zero Bound

Zero Cost Collar

Zero Coupon

Zero Coupon Bond

Zero Coupon Inflation Swap