Hypothesis test for a population mean_SP2014

Hypothesis test for a population mean_SP2014 - ECO 221 SP...

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ECO 221, SP 2014 Rollins College Prof. M. Vidovic Hypothesis Test For a Population Mean Due Wednesday, April 2, 2014 Coffee industry claimed that the average U.S. adult drinks 1.7 cups of coffee per day. To test this claim, a random sample of 34 adults was selected, and their average coffee consumption was found to be 1.85 cups per day with a standard deviation of 0.5 cups. Using 5% confidence level, is the sample mean of 1.85 convincing evidence that the average number of coffee cups that U.S. adults drink different from 1.7 cups? Follow the Steps in Hypothesis Testing 1. Describe the population characteristic about which the hypotheses are to be tested.
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Unformatted text preview: 2. State the null and the alternative hypotheses 3. Choose the significance level, α 4. Find the critical value(s) and state the decision rule. ECO 221, SP 2014 Rollins College Prof. M. Vidovic 5. Compute the test statistic and check the assumptions required for the test statistic are reasonable 6. Make decision: reject the null or do not reject the null 7. State the conclusion 8. Construct the 95% confidence interval for the population average coffee consumption of U.S. adults....
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  • Spring '14
  • Vidovic
  • Economics, Statistics, Null hypothesis, Statistical hypothesis testing, Prof. M. Vidovic, average coffee consumption

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