a.) Compare the driving distances of current and new model using Excels Data Analysis with a two-sample t test assuming unequal variances with a 95% confidence level.

b.) Examine the p-value test results for a two-tailed t-test results.

c.) Determine if there is a statistical difference reported.

d.) Write up your analysis of the problem in a Word file but be sure to copy and paste the t-test output results from Excel and paste it into your Word file as part of your analysis. Your paper should contain the following sections:

• Background of the case
• Purpose of the statistical test
• Results of the statistical test (with output)
• Interpretation and conclusions of the statistical test with an 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.

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. DATA file Golf Model Model Model Model Current New Current New Current New New 264 261 267 272 258 283 258 266 259 270 277 269 263 266 262 251 262 289 286 264 270 287 289 280 272 275 265 260 278 275 272 259 264 280 274 281 276 269 268 262 263 264 284 263 260 283 255 272 266 268 274 266 262 271 260 281 250 263 278 264 Current 281 274 273 263 275 267 279 274 276 262 283 250 253 260 270 263 261 255 263 279