This tutorial explains the basics of hypothesis testing. It also shows how to conduct a two-tailed hypothesis z-test for a population mean. One-Sample t-Test for μ: Z-test for mean- one-tailed example: Solved 2-tailed hypothesis Z-test: 00:00 Intro 00:25 Hypotheses 00:45 Rejection regions 1:48 Critical values 04:13 Test statistic 04:23: Decision/Conclusion