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Two Sample Z-Test Calculator

by Erma Khan
A two sample z-test is used to test whether or not the means of two populations are equal when the population standard deviations are known.
To perform a two sample z-test, simply fill in the information below and then click the “Calculate” button.

Sample 1

Sample 2

z = -1.608761

p-value (one-tailed) = 0.060963

p-value (two-tailed) = 0.121926

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