QMDS2010 case 2

CaseRecently, interest has been growing around the world in good wine. But navigating the world of wines is not easy. There are hundreds of types of grapes, thousands of wineries, some very small and some huge, and there are the vintage years—some excellent in some regions, and some not remarkable. The wine making industry has been heavily researched. Several agencies as well as newspapers, magazines, and websites rate wines, either on a five-star system or on a 0 to 100 point scale, giving a rating for a particular wine made from a given grape at a given winery, located at a given wine-making region in a particular year. Often wines are compared to see which one the public and wine experts like best. Often grapes themselves are rated in wine tests. The following are four of the most important wine grapes rated on a scale of 0 to a 100 for the wines these grapes produce. The above data are independent random samples of wine ratings in the four groups. Determine whether the average population ratings are equal for all groups, or whether there is statistical evidence for differences due to the kind of grape used. Include your output with your submission, and use the output to answer the following questions: Provide a full analysis of with your findings and your conclusions. Include rejection rules and statistical conclusions. Use a level of significance of . 05. What are your findings (English conclusion)?