Statistics 1 exam
Test 3 CIT 32000 Altom Spring 2012 Name _______________________________________ Important Notes: · There are parts of the test that rely on material I covered in class, and may not appear in the book. · In cases where I ask you for explanations or interpretations, I am prepared to accept a wide range of views if you can provide a strongly reasoned argument. You must convince me. Present whatever evidence seems compelling. · Use these pages as scratch paper. Show your work on all problems. Use the backs of the pages if necessary. · Calculators and stats software may be used, but show your work wherever possible. I give partial credit for thinking through problems even if they have the wrong answer. · Remember to read the problem carefully before beginning. Be meticulous and think carefully. · Return this test promptly. It must be in my hands by the beginning of the class period when it is due. I cannot accept late submissions. Test 3, CIT 32000, Spring 2012 Altom P. 2 For each of the following, state which test is most appropriate to the situation. Be sure to specify the exact test. For example, a paired t-test would not be appropriate in the same circumstances as an independent t-test. And keep in mind that “test” may apply to a wide range of procedures. 1. A study is conducted to determine if time of day has any effect on test grades. An introductory psychology class is selected for the study, because it has a standard curriculum taught across many sections. Two classes are selected for each time period: 8:00 AM, 1:00 PM, and 5:30 PM. Out of the total pool of around 40 students for each time period, 15 students are selected at random, for a total of 45. The test is administered to all students, and the test results for the study subjects are placed in SPSS. We want to know if there is a statistical difference between these time periods.