Psychology statistics

Answer the following in 60 words or more

1. What is the difference between a one-tailed and a two-tailed test of significance?  Under what circumstances would each be used?
2. Explain the process of hypothesis testing in evaluating possible solutions to a psychological research problem.
3. Formulate a null and alternative hypothesis

4. What is the five-step process for hypothesis testing?  Explain each step with a personal example of something that you experienced.

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