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Two Sample Z Test Calculator
Select null and alternative hypotheses:
\(H_0: \mu_1 - \mu_2 = 0\)
\(H_0: \mu_1 - \mu_2 \geq 0\)
\(H_0: \mu_1 - \mu_2 \leq 0\)
\(H_a: \mu_1 - \mu_2 \neq 0\)
\(H_a: \mu_1 - \mu_2 < 0\)
\(H_a: \mu_1 - \mu_2 > 0\)
(Sample Mean 1
Sample Mean 2
Population Standard Deviation 1
Population Standard Deviation 2
Sample Size 1
Sample Size 2
Significance Level
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