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Basic Statistics for Business and Economics ch 11

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Question
Answer
What are the five steps for two-sample tests of hypothesis of independent samples?   State the null and the alternate hypothesis. Select the level of significance. Determine the test statistic. Formulate a decision rule. Make the decision regarding null hypothesis and interpret the results.  
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What are the five steps for two-sample tests of hypothesis for proportions?   State the null and the alternate hypothesis. Select the level of significance. Determine the test statistic. Formulate a decision rule. Select a sample and make a decision.  
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What are the requirements or the assumptions for the Pooled t-test?   The sampled populations follow the normal distribution. The sampled populations are independent. The standard deviations of the two populations are equal.  
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p sub c   Pooled Proportion  
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s sub p squared   Pooled Sample Variance  
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X bar sub 1   Mean of the first sample  
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X bar sub 2   Mean of the second sample  
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d bar   Mean of the difference between dependent observations.  
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s sub b   Standard deviation of the difference between dependent observations.  
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