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# lecture+20-1 - figure We gather data for an hour and find...

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More Hypothesis Testing A Practicum

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Outline Review of Hypothesis Formulation Review of Steps Practicum
One-tailed and Two-tailed Tests One-tailed Tests Two-tailed Test 40 : 40 : 0 < μ a H H 18 . 0 : 18 . 0 : 0 p H p H a 12 : 12 : 0 = a H H The equality condition must ALWAYS be in the null hypothesis!

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1. Establish hypotheses: state the null and alternative hypotheses. 2. Set up the hypothesis test a) Determine the appropriate statistical test and sampling distribution. b) Specify the Type I error rate ( α29. c) State the decision rule. 3. Gather sample data and calculate the value of the test statistic. Steps in Testing Hypotheses

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At Fidelity Credit Union, we have prior information to suggest that the mean arrival rate is 5.9 customers per hour, but we believe it to be less than this

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Unformatted text preview: figure. We gather data for an hour and find that 3 customers arrive. Test the hypothesis that 3 or fewer would arrive if the null were true. Use the .05 level of significance. The 30-day mortality associated with intracranial hemorrhage is 16%. We try a new drug on 40 patients, a drug that is supposed to reduce mortality. Of those 40 patients, 4 die. Test the hypothesis that 4 or fewer would die if the null hypothesis were true. Use the .05 level of confidence. A significant finding would indicate that the drug may have an effect. Failure to find significance would indicate that the results might be due to random variation alone. Questions?...
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lecture+20-1 - figure We gather data for an hour and find...

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