This preview shows page 1. Sign up to view the full content.
Unformatted text preview: OM 210 001 Test 1, Descriptive Statistics
DATE For all Tuesday recitation sections of lecture section 001 (Thursday afternoon lecture), the first exam, Test 1, will be given in your recitation section (in your recitation classroom) on Tuesday, October 5, 2010. Test 1 will take the full period of one hour and 30 minutes of the regularly scheduled recitation. Test 1 will start and stop on time for your recitation. Time is of the essence, so work carefully but quickly. Be on time; latecomers may not be given the test. (In the event of missing Test 1, you will be assigned a score of zero for it. Test 1 may be made up only under extreme emergencies; a make-up can only be approved by me and will require a bona fide reason supported with appropriate documentation. Refer to the make-up policy stated in the course syllabus for more information.) COVERAGE Test 1 will cover all of what has been discussed for descriptive statistics, including data types, data presentation, and data summarization. Test 1 will be comprehensive of all the aforementioned topics as presented and covered in both lecture and recitation. The test will be based on my class presentations of my PowerPoint slide sets that are contained in the Course Content module on my OM 210 Blackboard course folder under the links 1, Introduction, 2 Data Presentation (ASW 2), and 3 Data Summarization (ASW 3). From the course textbook, the test will cover the following material: • Chapter 1, section 1.2. • Chapter 2, sections 2.1 to 2.3. • Chapter 3, sections 3.1 to 3.3, inclusive. The test will also cover any and all additional topics and material contained in my presentations that were presented in lecture (e.g., basic Q&A, uses of CV, data clustering, outliers using the 3s rule, margin of error, etc.) Test 1 will be based on my PowerPoint slide sets that I presented in class contained in my OM 210 Blackboard course folder on the Course Content page under the links 1 Introduction (ASW 1), 2 Data Presentation (ASW 2), and 3 Data Summarization (ASW 3). The topics and material covered are
• Data, contained on the page 1 Introduction (ASW 1). Item 1.3 in the Table of Contents. o Presentation titled “3 Data.ppt.” Data presentation contained on the page 2 Data Presentation (ASW 2). Items 1.1, 1.2, and 1.3 in the Table of Contents. o Presentations 1, 2, and 3, inclusive. Data summarization contained on the page 3 Data Summarization (ASW 3). Items 1.1, 1.2, 1.4, 1.5, and 1.6 in the Table of Contents. o Presentations 1, 2, 4, 5A and 5B, inclusive. • • (Note: Mean absolute deviation, MAD, will not be covered on Test 1. Other specific items and slides to be skipped as noted in the lectures). To download these presentations, from my OM 210 course web site home page, go to the “Course Content” link and follow the links: 1 Introduction (ASW 1) 3 Data.ppt 2 Data Presentation (ASW 2) 1 Qualitative Data.ppt 2 Data Presentation (ASW 2) 2 Numerical Data - Basics.ppt 2 Data Presentation (ASW 2) 3 Shape.ppt 3 Data Summarization (ASW 3) 1 Central Tendency.ppt 3 Data Summarization (ASW 3) 2 Variation.ppt 3 Data Summarization (ASW 3) 4 Shape.ppt The aforementioned presentations are all located in the Course Content module on my OM 210 Blackboard course folder. The specific statistics you should expect to have to calculate from the given sample data include: sample range, mean, median, mode, midrange, first quartile, third quartile, midquartile, interquartile range, variance, standard deviation, and coefficient of variation. You will also be expected to calculate the IQR/R ratio,
OM 210 001 F10 © Harvey Singer Test 1 Description 2 of 6 margin of error (MoE), and the 3s rule. Furthermore, you will also be expected to use all these statistics to make inferences by answering some basic and straightforward questions. You should expect to have to create the frequency distribution and its derivatives for the relative frequency distribution and the cumulative distributions, as on Quiz 1. You should also expect to have to sketch the histogram that is specified, also as on Quiz 1. Many of the questions on Test 1 will be similar to the questions on the homework problems and for the problems presented in your recitation (for example, problem 11 on page 89 and problems 18 and 19 on page 96). It will be similar in organization and coverage to the sample test posted on my OM 210 course website in the “Sample Tests” link (from the home page) under Item 1, Sample Test 1. The Excel workbook with the calculations is the .xls file posted beneath the .doc file. The problem on frequency distributions and histograms will be modeled on the homework problems assigned from the textbook. A good model for this is problem 21 on page 43 of chapter 2 of the text. FORMAT Test 1 will be structured so that you are first tested on the mechanics of descriptive statistics (by reporting your calculated results in tables), and then you are tested on your understanding and interpretation of those results (by answering direct and straightforward questions). The test will consist of two narrative descriptions of a business process. For one of the narratives, you will be given a sample of data. You will be asked to calculate about a dozen statistics (mean, median, mode, etc.) and list your results in tables provided on the test; to receive credit for your results you must show all work on separate paper (using a hand-held calculator only). State your calculated results to three (3) decimal digits. Note that the operational equations for mean, standard deviation, CV, etc., will not be provided with the test. They should be written correctly on your one-page study guide (see below), and you should be familiar with their use in calculation. The exam will consist of about 24 questions that must be answered by using the correct statistic or by inferring correctly from your calculated statistics. For each of problems, fill in your responses in the numbered blank spaces provided on the attached answer sheets. (Answer just exactly what was asked.) Show your work
OM 210 001 F10 © Harvey Singer Test 1 Description 3 of 6 on the attached work sheet (only manual calculation with a hand calculator will be accepted). The test questions on the exam will be modeled on my sample test problem Sample Test 1 (lightbulb case).doc. The sample test is posted on my OM 210 course website in the “Sample Tests” link (from the home page) under Item 1, Sample Test 1. The Excel workbook containing the calculations is the .xls file posted beneath the .doc file. From the textbook, good models for the summary statistics on Test 1 are problems 5, 6, 11, 18, and 19 from chapter 3 of the textbook, as presented in class, with additional questions as asked and answered in lecture and recitation. You will also be asked to build frequency distribution and sketch histograms. A good model for this problem on the test are problems 17, 18, 19, and 21 from chapter 2 of the textbook, with additional questions as asked and answered in lecture and recitation. The test is closed-book and closed notes. You are allowed to bring and to use during the exam a one-page (8.5 x 11 inch paper) study guide of your own making. The content of your guide is up to your discretion; you are solely responsible for its correctness. No cell phones are allowed. MATERIALS TO BRING WITH YOU Bring with you the following materials:
• Bring your own pens and pencils. (No extra paper is needed; a blank work sheet will be provided in the test booklet for your calculations.) There will be an answer sheet attached to the test for your answers. Bring your own working calculator. You will need a “scientific” calculator with a square root key. Calculators will not be provided by your TA. If your calculator malfunctions during the test, perform your calculations manually. • • Bring your own one-page study guide. Your study guide should include the operational equations for mean, standard deviation, CV, etc. and their uses (These will not be provided with the test.)
Test 1 Description OM 210 001 F10 © Harvey Singer 4 of 6 –
– You are solely responsible for their correctness. Your TA will not confirm your study guide. Bring your student ID card. ID may be checked. • If English is not your native language, you may have with you and use during the test a foreign language-to-English translation dictionary. Let your TA know BEFORE test-time if you plan to use a dictionary. However, no other reference materials are allowed. EXAM RULES You must be officially registered in the recitation in which you take Test 1. If you miss Test 1 for your recitation, you will have to apply for a make-up. (Switching recitations without prior permission will be penalized severely by a substantial deduction of points from the score.) Be on time for the start of the exam. Once the exam has begun, late-comers may not be given the exam. Regardless of arrival time, the exam will end on time at the end of the regularly scheduled class time. No cell phones are allowed, for any reason. Once the exam begins, no one will be excused to leave the room FOR ANY REASON, including the use of the bathroom. You may leave the room only AFTER you have submitted your exam for grading. The test will NOT be returned to you if you reenter the room. The test is administered and conducted under the University honor code. The test must be worked individually, on your own, and alone, on your personal integrity and honor. You are bound by the University honor code to neither receive nor furnish any assistance of any kind. Under the penalties of cheating and perjury, you must swear to this in writing by signing an honor code statement on the exam. Any violations will be dealt with severely. There will be an honor code statement on the exam on the last page of the exam. If you have been honorable in taking the exam, sign it. Exams with unsigned statements will either be severely penalized or not graded. OM 210 001 F10 © Harvey Singer Test 1 Description 5 of 6 When you have completed your test, attach all sheets in their proper order to the exam paper. Clearly write full name on your submitted exam. RECOMMENDATIONS For the problems: • Read each problem carefully and answer exactly what is asked. • Complete all problems and all parts in order. • On the problems, show ALL work (if there is any to show). • Answer exactly what was asked in the question or the statement. Simply state your response; full and complete sentences are not necessary. • Check your work for units (like dollar signs) and arithmetic. • Explicitly state all assumptions that were made and all rules that were used. • Tables and charts should be drawn carefully and neatly and be clearly labeled. This test is composed of word problems. To prepare for the exam, you should practice solving problems from the aforementioned sections of the text. Work the problems in the text to compare your results to mine and/or to the answers stated in Appendix D. Also, work the sample problems in the my PowerPoint presentations to reproduce for yourself my results. For practice, take the sample test yourself located under Item 1 on the “Sample Tests” page from the homepage of my OM 210 web site. The questions on Test 1 will be similar to the questions on the Sample Test 1. The corresponding Excel workbook of the calculations is contained under the same items. Remember, you have one and a half hours to take Test 1. Replicate test conditions as closely as possible. In particular, watch you time carefully as you practice Sample Test 1. Also, the problem on frequency distributions and histograms will be modeled on the homework problems assigned from the textbook. Good models for this are problem 17 on page 38 and problems 18 and 19 on page 39 of chapter 2 of the text. Remember, this is a timed exam. You have the full period of the class, 1 hour and 30 minutes. TIME IS OF THE ESSENCE. You must work quickly. Speed comes with practice, so practice as recommended above. OM 210 001 F10 © Harvey Singer Test 1 Description 6 of 6 OM 210 001 F10 © Harvey Singer Test 1 Description 7 of 6 ...
View Full Document
This note was uploaded on 02/19/2011 for the course OM 210 taught by Professor Singer during the Spring '08 term at George Mason.
- Spring '08