Setting: Corks used in wine bottles can deteriorate due to a number of factors. Sometimes, the deterioration results in spoilage of the wine. In a taste test, it was determined 16 of 91 bottles of white wine had some spoilage. Wine producers believe there is reason for concern if more than 15% of wine bottles have spoiled from cork deterioration. Question: Does the data give reason for concern at a significance level of a = 0.1? Conduct the test 1. Parameter of interest: ? 2. Define null hypothesis: ? 3. Alternative hypothesis: ? 4. First note both npo = 13.65 > 10 and n(1 - po) = 77.35 > 10, so a large-sample test procedure can be used. Test statistic formula: Z = 5. Rejection region: ? 6. Calculate test statistic: ? 7. Conclusion: ? P-Po Po(1-po)/n =?