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Scenario 1. A tool manufacturer would like to test the wear of three types of cutters used in a lathe operation. Four cutters of each type are tested to see how long they will last (in hours) in continuous operation until they need to be sharpened. What type of procedure is appropriate to tell if there is a difference between the average wear time between the cutter types? Scenario 2. A large resort in Hawaii wants to project hotel restaurant sales for the upcoming summer season. The resort believes that restaurant sales year may depend on sales from the previous summer season and the proportion of hotel rooms booked for the current summer season. What procedure should they use to help predict restaurant sales from the two possible explanatory variables? Scenario 3. Suppose an instructor would like to compare the effectiveness between his online class and his on campus class. He considers the class format to be the treatment, where students are randomly assigned to either the online class or the campus class. Their nal exam grade is the response. The nal exam scores are recorded and the average between the two class types are compared. What type of testing procedure will be most appropriate for this data? Scenario 4. As a student project Natalie would like to see whether there is statistical evidence Earth is warmer today versus 30 years ago. She randomly samples 100 locations around the world and collects the annual average high for each location for the years 1933 and 2013. She proceeds to compare the differences among the time periods with respect to location. What procedure should be used to test whether the average difference in temperature between the locations is greater than zero? Scenario 5. In September of 2012, OSU initiated a smoke free campus policy prohibiting smoking on campus. Suppose researchers would like to see whether the proportion of students that smoke {in general] has decreased since the passing of the policy. They have a random sample of students from before the policy was invoked and another after the policy invoked where students have indicated whether or not they smoke. What type of procedure is appropriate to test whether there is a difference in the proportion of students that smoke for prior to the policy and after the policy? A. Multiple Linear Regression B. Two Sample t Test Scenario 1 C. Two Proportions z test D. One Proportions z test E. Single Factor ANOVA A. Multiple Linear Regression B. Two Sample t Test Scenario 2 C. Two Proportions z test D. One Proportions z test E. Single Factor ANOVA A. Multiple Linear Regression B. Two Sample t Test Scenario 3 C. Two Proportions z test D. One Proportions z test E. Single Factor ANOVA A. Multiple Linear Regression B. Two Sample t Test Scenario 4 C. Two Proportions z test D. One Proportions z test E. Single Factor ANOVA A. Multiple Linear Regression Scenario 5 B. Two Sample t Test C. Two Proportions z test D. One Proportions z test E. Single Factor ANOVA
