Statistics and Golf Ball

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Case Study 1: Par, Inc.

Par, Inc., is a major manufacturer of golf equipments. Management believes that Par’s market share could be increased with the introduction of a cut-resistant, longer-lasting golf ball. Therefore, the research group at Par has been investigating a new golf ball coating designed to resist cuts and provide a more durable golf. The tests with the coating have been promising.
One of the researchers voiced concern about the effect of the new coating on driving distances. Par would like the new cut-resistant ball to offer driving distances comparable to those of the current-model golf ball. To compare the driving distances for the two balls, 40 balls of both the new and current models were subjected to distance tests. The testing was performed with a mechanical hitting machine so that any difference between the mean distanced for the two models could be attributed to a difference in the two models. The results of the tests, with distances measured to the nearest yard, follow. These data are available on the excel file “Golf”.

Managerial Report

1. Formulate and present the rationale for the hypothesis test that par could use to compare the driving distances of the current and new golf balls. 2. Analyze the data to provide the hypothesis testing conclusion. What is the p-value for the test? What is your recommendation for Par, Inc.? 3. Provide descriptive statistical summaries of the data for each model. 4. What is the 95% confidence interval for the population mean of each model, and what is the 95% CI for the difference between the means of the two populations? 5. Do you see a need for the larger sample sizes and more testing with the golf balls? Discuss.

Case Study 2: Higher Education in Asia-Pacific

The pursuit of a higher education degree in business is now international. A survey shows that more and more Asians choose the MBA degree route to corporate success. The number of applicants for MBA

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