Practically: software will usually perform two-tailed tests by default. Unless you have a good reason, just stick with the default two-tailed test. Statistical significance is concerned with whether ...

In Hypothesis Testing 1, you were introduced to the ideas of hypothesis testing in the context ... In Example 3, you the alternative hypothesis leads you to reject the null hypothesis for either large ...

we will expand the lessons of Module 1 to composite hypotheses for both one and two-tailed tests. We will define the “power function” for a test and discuss its interpretation and how it can lead to ...

You’ll want to use this as part of your testing and process ... value of +/-1.96 for a two-tailed test. Since -0.69 is bigger ...