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Null and Alternative Hypotheses

Discuss the null hypothesis. How is it framed? What is the alternate hypothesis? How does it relate to the null hypothesis? Can you have possible outcomes not embraced by the null or alternate hypotheses?

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The alternative hypothesis describes the expected conclusion of the statistical test. You only accept the alternative hypothesis if there is strong enough evidence for it. The null hypothesis describes everything not covered by the alternative hypothesis.

So, for example, let's say that you think that college students are more than 23 years old on average. If you wanted to test this theory, your alternative hypothesis ...