Exam-1-Universe-Ch2-A - BUS-271 Exam-1 Universe Answers...

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1 BUS-271 Exam-1 Universe Answers 2011-09-07 CHAPTER 2 201. [Chapter 2; 24 points] (Definitions) a) [4 p.] Define the terms “frequency” and “relative frequency” as they pertain to a data set “Frequency” simply refers to a count of the number of entitie s that gave the same answer to a question, or who fall into the same category. (Drive the same car, fall into the same income bracket.) “Relative frequency” refers to the fraction or % that a frequency makes out of the whole number of observations in the data set. b) [4 p.] Using the following data set, calculate relative frequencies for each category: Age Count b: rel.freq. c: cum.rel.freq. ----- -------- ------------- ------------------ 21 23 10 10/50=0.20 0.20 24 26 14 14/50=0.28 0.2+0.28=0.48 27 29 17 17/50=0.34 0.48+0.34=0.82 30 32 7 7/50=0.14 0.82+0.14=0.96 33 35 2 2/50=0.04 0.96+0.04=1.00 -------- n=50 c) [4 p.] Calculate cumulative relative frequencies for each category (Above)
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2 d) [4 p.] Draw an Ogive for this data set. Use a separate sheet (at end). An Ogive is a graph of cumulative frequency or cumulative relative frequency. It rises from zero to n (or to 1.00). e) [4 p.] Draw a Pareto diagram for this data set. Use a separate sheet (at end).
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