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Unformatted text preview: Hypothesis Testing Steps 1. Determine H o and H 1 . 2. Determine the test statistic / test value using the flow chart. * 3. Determine the decision rule. 4. Make a decision 5. Write a conclusion. s z Critical Value 0.10 0.05 0.025 0.01 0.005 Value 1.28 1.645 1.96 2.33 2.58 For left-tailed test, use the negative of the value in the above table. Ex.) Use -1.28 instead of 1.28 For two-tailed test, calculate the value of 2 . Then look that up in the above table. Ex.) =0.05. Then 2 =0.025 Look up 0.025 in the chart & get 1.96 as the value. Technically, you will have 2 critical values. +1.96 & -1.96. *If your is not listed in the chart, find the z in Table E using methods in chapter 6 & 7. s t Critical Values Go to the t-distribution chart. Notice underneath Confidence Intervals you see One tail, and Two tails, . For one tail that is the for the one-tailed test. If you need a two-tailed test, two tail is what your must be in order to use that value. must be in order to use that value....
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- Spring '09