MAT 221 Lecture Notes - Lecture 13: Statistical Significance, Sampling Distribution, Null Hypothesis
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MAT 221 Full Course Notes
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If the samples are drawn from a normal population distribution, then the sampling distribution is normal regardless of the sample size n. If the samples are drawn from a population that is not normal, then the sample size must be greater than 30 for the sampling distribution to be normal. If so, you may want a larger (such as 0. 05) so that you will be less likely to miss an interesting result. 6. 3 use and abuse of tests: statistical significance vs. Practical significance: statistical significance only says whether the observed effect is likely to be due to chance alone because of random sampling, statistical significance may not be practically important. That is because statistical significance doesn"t tell you about the magnitude of the effect, only that there is one: always think about the context. No new notes taken, review for exam 3.
