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STAT200Student_Answer_Sheet_STAT200_Spring_2019_OL11.docxSTAT 200 Final Examination Spring 2019 OL1/US1 Page 1 of 10
STAT 200 Introduction to Statistics Name
Final Examination: Spring 2019 OL1/US1 Instructor __________________________
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.
Please sign (or type) your name below the following honor statement:
I understand that it is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. I promise that I did not discuss any aspect of this exam with anyone other than my instructor. I further promise that I neither gave nor received any unauthorized assistance on this exam, and that the work presented herein is entirely my own.
Name ___________________ Date__3/10/2019_____
Record your answers and work.
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Problem Number |
Solution |
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1
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Answer:
(a) Density of people per square kilometer
(b) Set of densities of people per square kilometer of all countries
Justification for (a) and (b):
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2 |
Answer:
(a) Nominal
(b) Mode
Justification for (a) and (b):
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3
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Answer:
(a) interval
(b) statistic
Justification for (a) and (b):
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4
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Answer:
(a) Stratified random sampling
(b) When completing analysis or research on a group of entities with similar characteristics, a researcher may find that the population size is too large for which to complete research. To save time and money, an analyst may take on a more feasible approach by selecting a small group from the population. The small group is referred to as a sample size, which is a subset of the population that is used to represent the entire population. A sample may be selected from a population through a number of ways, one of which is the stratified random sampling method.
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5
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Answer:
(a) ANOVA
(b) The Analysis Of Variance, popularly known as the ANOVA, is a statistical test that can be used in cases where there are more than two groups.
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6
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Answer:
(a)
(b)
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