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