The choice between a left, right, or two-tailed statistical test is dictated by the alternative hypothesis. A left-tailed test is administered when the alternative hypothesis points to a drop, while a right-tailed test is suitable for a rise. A two-tailed test is employed when there is a change from the null hypothesis, irrespective of the direction of the change.
| Topic | Problem | Solution |
|---|---|---|
| None | A company claims that their average customer sati… | First, we identify the null and alternative hypotheses. The null hypothesis (H0) is that the averag… |