Statement I: The null hypothesis for testing of difference between means is generally stated as Ho: µ₁ ≠ μ2, where (μ₁) and (µ2) are the population means of the two populations, respectively.
Statement II: When samples happen to be small samples and population variances are not known but assumed to be equal, Z-test is employed for testing the null hypothesis.
In the light of the above statements, choose the most appropriate answer from the options given below: