Statistics > EXAM > STAT 200 Final Examination Spring 2019 OL1/US1 Answer Sheet | Spring 2019 OL1/US1 Answer Sheet_Intr (All)

STAT 200 Final Examination Spring 2019 OL1/US1 Answer Sheet | Spring 2019 OL1/US1 Answer Sheet_Introduction to Statistics

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STAT 200 Final Examination Introduction to Statistics Spring 2019 OL1/US1 Answer Sheet Instructions: This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. Record your answers and work in this document. Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on. Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand- write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. Your exam will receive a zero grade unless you complete the following honor statement. Record your answers and work. Problem Number Solution 1 Answer: (a) (ii) Density of people per square kilometer (b) (i) All countries in the world Justification for (a) and (b): (a) : A variable is the measurement or observation of the individual(s). (b) : The population is the set of values of the variable for the entire group of individuals. 2 Answer: (a) (ii) Nominal (b) (iii) Mode Justification for (a) and (b): (a) : Since there are no numbers, no order to the data, and you cannot perform any arithmetic, it is a nominal measurement. (b) : Since there are no numbers, you find the data value that occurs the most frequently in the data, this is called the mode. 3 Answer: (a) (iii) Ordinal (b) (ii) Statistic Justification for (a) and (b): (a) : Even though 1 (being poor) and 5 (being excellent) uses numbers, they are really not numbers, but are used to assign numerical values to ordinal value. (b) : It is a number that is taken from a sample and describes the sample. 4 Answer: (a) Cluster sampling (b) Cluster sampling is used because 10 classrooms are selected out of the individual first grade classes, and ALL of the children in each of the 10 selected classrooms are assessed.

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