Question: Chapter Review Case Problem Par, Inc. Par, Inc., is a major manufacturer of golf equipment. Management believes that Par's market share could be increased with

Chapter Review Case Problem Par, Inc. Par, Inc., is a major manufacturer of golf equipment. 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 ball. 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 distances 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 website that accompanies the text.

a. Compare the driving distances of current and new model using Excel's Data Analysis with a two-sample t test assuming unequal variances with a 95% confidence level.

b. Examine thep-value test results for a two-tailedt-test results.

c. Determine if there is a statistical difference reported.

d. copy and paste thet-test output results from Excel and paste it into your Word file as part of the analysis.

explanation for why unequal variances was assumed and why a two-tailed test was used, rather than a one-tailed test. Consider the likelihood of either a Type I or Type II error with your justification.

Current

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