1. If n = 200 and X = 20, using confidence intervals to test the hypothesis that the population proportion is .4. Should you accept or reject the hypothesis at the .05 level of significance? 2. This table contains the cost per ounce ($USD) for a sample of 14 dark chocolate bars a. Write the hypothesis for testing the claim that the average price is no more than .88 b. Construct a 95% Confidence Interval estimate for the population cost per ounce of dark chocolate bars (hopefully you still have the work from HW 6). c. Test the hypothesis at the .05 level. 3. A company claims that the average price of a meal is no more than $260 for a family of 4 with a historical standard deviation of 5. Write the null and alternate hypothesis statements. Sample of 16 people reveals an average of 263. Using the p test, test this hypothesis and determine if you should accept or reject the hypothesis at the .05 level. 4. Using the same information, set up the hypothesis test using the critical value formula at the ? =.1level of significance . Are the results the same?
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