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Midterm 1 Stats

Midterm 1 Stats - PSTAT 5E Summer 2009 Session A Name Perm...

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PSTAT 5E Name: Summer 2009 Session A Perm: Midterm 1 Please follow the instructions carefully. You have 75 minutes (11:00am-12:15pm) to complete the exam, and you should attempt all questions. Be sure to fully explain your answers (except multiple choices). Answers without work will receive no credit. Partial credit is given, so I encourage you to write down your steps in order to receive partial credit. Anyone found copying off of another student’s exam or consulting their textbook or notes during the exam will be given an “F” for the course. You may use a calculator on the exam, but you may not use a cell phone/pda/mp3 player as a calculator. If you have two answers to a single question, you must cross-out the answer you don’t want graded and circle the answer you want graded. If you fail to do this, you will receive a zero on the problem. Good luck! _____________________________________________________________________________________ 1. Multiple Choices ( 1’ for each) (1) For ease of data entry into a university database, 1 indicates that the student is an undergraduate and 2 indicates that the student is a graduate student. In this case data are A. categorical B. quantitative C. either categorical or quantitative D. neither categorical nor quantitative (2) If a data set has an even number of observations, the median A. can not be determined B. is the average value of the two middle items C. must be equal to the mean D.
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