6:18 PM Sun Mar 26 ... Ims.brocku.ca 4) You want to know if there is a difference in the grade given out by faculty based on whether or not they have tenure. You obtain the records of 24 professors (12 have tenure and 12 do not). While entering the data into your computer you notice that the marks follow a very typical pattern for university grades (lots of relatively high marks with a small minority of very low grades). 5) You wonder which restaurant in your town has faster service McDunnies or Burger Queen (they are next to each other on Main Street). Over a 10 day period you ask 30 people to each visit the McDunnies, order a smiley meal, and then immediately go next door to Burger Queen and order a kiddy meal. You record the time it takes to be served at each location. 93% 6:18 PM Sun Mar 26 ... Ims.brocku.ca 1) You want to test and see if there is a relationship between favorite size of dog and political affiliation. You ask 25 conservative, 25 liberal, 25 Green, 25 PPC and 25 NDP supporters if they have a large, medium, or small dog. 2) You wonder if the amount of time it takes a person to learn a new language differs based on their age. You ask an instructor at an ESL (English as a second language) school to record the age of 40 new students and how long it took for them to become functionally literate. You then divide them in to age groups (17-25, 26-35, 36 and older). When examining the data you note that the oldest group has many low scores but a few very high ones. 3) You work for a manufacturer of car tires. Your boss is interested in knowing if a new procedure can reduce the costs of making tires. You randomly select the operating costs for 10 days at your plant and compare them to the cost for 10 days randomly selected from another plant that has switched to the new system. The old system had an average daily cost of $54,000 with a standard deviation of 355. The new system had an average daily cost of $52,100 with a standard deviation of 730. 6 93%