Chapter 20 and 21 - Chapter 20/21 Hypothesis Testing State...

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Chapter 20/21 Hypothesis Testing State the hypotheses. Formulate an analysis plan. Analyze sample data. Interpret the results.
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Chapter 20/21 Hypothesis Testing State the hypotheses. Every hypothesis test requires the analyst to state a null hypothesis and An alternative hypothesis . The hypotheses are stated in such a way that they are mutually exclusive. That is, if one is true, the other must be false; and vice versa.
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Chapter 20/21 Hypothesis Testing Null hypothesis . The null hypothesis, denoted by Ho , is usually the hypothesis that sample observations result purely from chance. Statement that you try to find evidence against Statement of no difference Statement of no effect Alternative hypothesis . The alternative hypothesis, denoted by H1 or Ha , is the hypothesis that sample observations are influenced by some non-random cause. Statement that you try to find evidence for Statement of difference Statement of effect
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Chapter 20/21 Hypothesis Testing Formulate an analysis plan. The analysis plan describes how to use sample data to accept or reject the null hypothesis. It should specify the following elements. Significance level α . Often, researchers choose significance levels equal to 0.01, 0.05, or 0.10; but any value between 0 and 1 can be used. Test method . Typically, the test method involves a test statistic and a sampling distribution . Computed from sample data, the test statistic might be • a mean score, proportion, • difference between means, difference between proportions, z-score, t-score, chi-square, etc. P-Value:
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This note was uploaded on 03/27/2012 for the course STT 200 taught by Professor Dikong during the Spring '08 term at Michigan State University.

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Chapter 20 and 21 - Chapter 20/21 Hypothesis Testing State...

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