Business Statistics, Canadian Edition, 4th edition By Norean R. Sharpe
Email: richard@qwconsultancy.com
Business Statistics, Cdn. Ed., 4e (Sharpe) Chapter 1: An Introduction to Statistics Chapter 1 has no questions. 1) There are no questions in this chapter.
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Business Statistics, Cdn. Ed., 4e (Sharpe) Chapter 2: Data Short Answer - Quiz A 1) The mission of a research firm is to "explore the impact of the Internet on families, communities, work, home, and daily life." In August - September 2015 they conducted telephone interviews with a sample of Canadian adults aged 18 and older about online shopping. Describe the W's for the information given. • Who: • What: • When: • Where: • How: • Why: Answer: • Who: Canadian adults aged 18 and older • What: online shopping • When: August - September 2015 • Where: Canada • How: telephone interviews • Why: to explore the impact of the Internet on daily life, specifically online shopping L.O.: 1
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2) The following table displays some of the data collected by the above research firm in their study of online shopping. List the variables in the data set. Indicate whether each variable is categorical or quantitative. If the variable is quantitative, give the units.
Age 25 47 38 30
Gender Male Female Female Male
Household Income $55,000 $60,000 $110,000 $62,000
Participated in online auction? Yes No No No
Monthly Time (hours) per amount spent week browsing online online retailers $250 6 $50 4 $120 10 $75 4
Answer: Categorical: Gender, Participated in online auction? Quantitative: Age (years), Household Income ($), Monthly amount spent online ($), Time per week browsing online retailers (hours). L.O.: 2 3) In addition to the variables listed above, data were also collected on the variables listed below. Indicate whether each is nominal or ordinal. • Region (Urban, Suburban, Rural) • Education (Less than High School, High School, College, University) • Marital Status (Single, Widowed, Divorced, Married) Answer: • Region (Urban, Suburban, Rural) Nominal • Education (Less than High School, High School, College, University) Ordinal • Marital Status (Single, Widowed, Divorced, Married) Nominal L.O.: 2 4) For each of the following, indicate whether the data are cross-sectional or time series: • Weekly receipts at a clothing boutique • Monthly demand for an automotive part • Percentage of adults who bank online Answer: • Weekly receipts at a clothing boutique Time Series • Monthly demand for an automotive part Time Series • Percentage of adults who bank online Cross-Sectional L.O.: 2
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5) Eastland College instructors and students are asking to review a new computer tutorial. Peter, author of the tutorial, wants to analyze the feedback. He gets a spreadsheet. List the variables in the data set. Indicate whether each variable is categorical or quantitative. If the variable is categorical, indicate whether it is nominal or ordinal. Does the table contain an identifier variable? Number of Tutorial Level of visits Name Status Access ID satisfaction per week Ann Instructor AB235 Moderately helpful 3 Boris Student BC1090 Very helpful 4 Parul Student PR1841 Not helpful 1 Paul Instructor PG145 Somewhat helpful 2
Time (minutes) spent per week 60 120 30 45
Answer: Quantitative: Number of visits per week, Time spent per week (minutes) Categorical: Name (nominal), Status (nominal), Tutorial Access ID (nominal, identifier), Level of satisfaction (ordinal). L.O.: 2 Short Answer - Quiz B 1) Consumer Reports Health routinely compares drugs in terms of effectiveness and safety. Suppose that in the summer of 2014 they reviewed drugs used to treat arthritis. Information was reported on convenience of use (how many pills required each day), possible side effects (e.g., dizziness, stomach upset), cost, and ratings of effectiveness in relieving symptoms (very effective, somewhat effective, not effective). Describe the W's for the information given. • Who: • What: • When: • Where: • How: • Why: Answer: • Who: drugs to treat arthritis currently on the market • What: convenience of use, side effects, cost, effectiveness ratings • When: summer 2014 • Where: not specified • How: testing on drugs • Why: to compare arthritis drugs it terms of effectiveness and safety L.O.: 1
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