Chapter_1_HW_answers_classroom_examples

Chapter_1_HW_answers_classroom_examples - ISDS 2010,...

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ISDS 2010, Chapter 1, Homework Questions and Answers (Page 1) Page 19. 1. Discuss the differences between statistics as numerical facts and statistics as a discipline or field of study. a. The term "statistics" refers to the art and science of collecting, analyzing, presenting, and interpreting data. b. The term "statistics" is sometimes used to refer to numerical facts such as averages, medians, percents, and index numbers such as RBIs in baseball, SES in economics, or GPA in school which are the product of the art and science of colleting, analyzing, presenting, and interpreting data.
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ISDS 2010, Chapter 1, Homework Questions and Answers (Page 2) Page 19. 2. Conde Nast Traveler magazine data from Table 1.6 and the file "Hotel.xls" are below: Name of Property Country Room Rate Number Rooms Overall Score Graveteye Manor England $$ 18 83.6 Villa d'Este Italy $$$$ 166 86.3 Hotel Prem Germany $ 54 77.8 Hotel d'Europe France $$ 47 76.8 Palace Luzern Switzerland $$ 326 80.9 Royal Crescent England $$$ 45 73.7 Hotel Sacher Austria $$$ 120 85.5 Duc de Bourgogne Belgium $ 10 76.9 Villa Gallici France $$ 22 90.6 a. How many elements are in this data set? In this case the number of elements equals the number of hotels, so there are 9 elements. b. How many variables are in this data set? There are 5 variables: Name of property, country, room rate, number of rooms, and overall score. c. Which variables are qualitative and which variables are quantitative? Qualitative variables are: name of property and country. Quantitative variables are: room rate, number of rooms, and overall score.
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ISDS 2010, Chapter 1, Homework Questions and Answers (Page 3) Page 19. 3. Statistics for the Conde Nast Traveler data from Table 1.6 and "Hotel.xls" are below: Name of Property Country Room Rate Number Rooms Overall Score Graveteye Manor England $$ 18 83.6 Villa d'Este Italy $$$$ 166 86.3 Hotel Prem Germany $ 54 77.8 Hotel d'Europe France $$ 47 76.8 Palace Luzern Switzerland $$ 326 80.9 Royal Crescent Hotel England $$$ 45 73.7 Hotel Sacher Austria $$$ 120 85.5 Duc de Bourgogne Belgium $ 10 76.9 Villa Gallici France $$ 22 90.6 2 4 0.22 0.44 89.78 81.34 Pct=England Pct=$$ Average Average a. Average number of rooms = 89.78 b. Average overall score = 81.34 c. Percentage of hotels in England = 22% d. Percentage of hotels with room rate of $$ = 44%
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This note was uploaded on 04/21/2008 for the course ISDS 2010 taught by Professor Vanscotter during the Spring '08 term at LSU.

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Chapter_1_HW_answers_classroom_examples - ISDS 2010,...

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