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3. A Bloomberg Businessweek North American subscriber study collected data from a sample of 2861 sub-scribers. Fifty- nine percent of the respondents indicated an annual income of $ 75,000 or more, and 50% reported having an American Express credit card. a. What is the population of interest in this study? b. Is annual income a categorical or quantitative variable? c. Is ownership of an American Express card a categorical or quantitative variable? d. Does this study involve cross- sectional or time series data? e. Describe any statistical inferences Bloomberg Businessweek might make on the basis of the survey.

3. A Bloomberg Businessweek North American subscriber study collected data from a sample of 2861 sub-scribers. Fifty- nine percent of the respondents indicated an annual income of $ 75,000 or more, and 50% reported having an American Express credit card. a. What is the population of interest in this study? b. Is annual income a categorical or quantitative variable? c. Is ownership of an American Express card a categorical or quantitative variable? d. Does this study involve cross- sectional or time series data? e. Describe any statistical inferences Bloomberg Businessweek might make on the basis of the survey.

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.6: Summarizing Categorical Data
Problem 4BGP
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3. A Bloomberg Businessweek North American subscriber study collected data from a sample of 2861 sub-scribers. Fifty- nine percent of the respondents indicated an annual income of $ 75,000 or more, and 50% reported having an American Express credit card. a. What is the population of interest in this study? b. Is annual income a categorical or quantitative variable? c. Is ownership of an American Express card a categorical or quantitative variable? d. Does this study involve cross- sectional or time series data? e. Describe any statistical inferences Bloomberg Businessweek might make on the basis of the survey. 4. Table 1.8 shows a data set containing information for 25 of the shadow stocks tracked by the American Association of Individual Investors. Shadow stocks are common stocks of smaller companies that are not closely followed by Wall Street analysts. The data set is also on the website that accompanies the text in the file named Shadow02. a. How many variables are in the data set? b. Which of the variables are categorical and which are quantitative? TABLE 1.8 DATA SET FOR 25 SHADOW STOCKS Gross Profit Margin (%) Market Ticker Symbol Сар ($ millions) Price/ Earnings Ratio Company DeWolfe Companies North Coast Energy Hansen Natural Corp. MarineMax, Inc. Nanometrics Incorporated Exchange AMEX DWL 36.4 8.4 36.7 OTC NCEB 52.5 6.2 59.3 ОТС HANS 41.1 14.6 44.8 NYSE HZO 111.5 7.2 23.8 OTC ОТС NANO 228.6 38.0 53.3 TeamStaff, Inc. TSTF ETC MSS SEN 92.1 33.5 4.1 Environmental Tectonics AMEX 51.1 35.8 35.9 Measurement Specialties SEMCO Energy, Inc. Party City Corporation Embrex, Inc. АМEХ NYSE OTC 101.8 193.4 97.2 26.8 37.6 18.7 23.6 PCTY 15.9 36.4 ОТС EMBX 136.5 18.9 59.5 Tech/Ops Sevcon, Inc. ARCADIS NV AMEX TO 23.2 20.7 35.7 ОТС ОТС ARCAF 173.4 8.8 9.6 XING EWST Qiao Xing Universal Tele. Energy West Incorporated Barnwell Industries, Inc. Innodata Corporation 64.3 22.1 30.8 ОТС 29.1 9.7 16.3 AMEX BRN 27.3 7.4 73.4 ОТС INOD 66.1 11.0 29.6 MDCI INMRY Medical Action Industries Instrumentarium Corp. Petroleum Development Drexler Technology Corp. Gerber Childrenswear Inc. Gaiam, Inc. Artesian Resources Corp. York Water Company OTC 137.1 240.9 26.9 3.6 30.6 ОТС 52.1 ОТС PETD 95.9 6.1 19.4 233.6 126.9 ОТС DRXR 45.6 53.6 NYSE GCW 7.9 25.8 GAIA ARTNA ОТС 295.5 62.8 68.2 20.5 60.7 ОТС 45.5 OTC YORW 92.2 22.9 74.2
Transcribed Image Text:3. A Bloomberg Businessweek North American subscriber study collected data from a sample of 2861 sub-scribers. Fifty- nine percent of the respondents indicated an annual income of $ 75,000 or more, and 50% reported having an American Express credit card. a. What is the population of interest in this study? b. Is annual income a categorical or quantitative variable? c. Is ownership of an American Express card a categorical or quantitative variable? d. Does this study involve cross- sectional or time series data? e. Describe any statistical inferences Bloomberg Businessweek might make on the basis of the survey. 4. Table 1.8 shows a data set containing information for 25 of the shadow stocks tracked by the American Association of Individual Investors. Shadow stocks are common stocks of smaller companies that are not closely followed by Wall Street analysts. The data set is also on the website that accompanies the text in the file named Shadow02. a. How many variables are in the data set? b. Which of the variables are categorical and which are quantitative? TABLE 1.8 DATA SET FOR 25 SHADOW STOCKS Gross Profit Margin (%) Market Ticker Symbol Сар ($ millions) Price/ Earnings Ratio Company DeWolfe Companies North Coast Energy Hansen Natural Corp. MarineMax, Inc. Nanometrics Incorporated Exchange AMEX DWL 36.4 8.4 36.7 OTC NCEB 52.5 6.2 59.3 ОТС HANS 41.1 14.6 44.8 NYSE HZO 111.5 7.2 23.8 OTC ОТС NANO 228.6 38.0 53.3 TeamStaff, Inc. TSTF ETC MSS SEN 92.1 33.5 4.1 Environmental Tectonics AMEX 51.1 35.8 35.9 Measurement Specialties SEMCO Energy, Inc. Party City Corporation Embrex, Inc. АМEХ NYSE OTC 101.8 193.4 97.2 26.8 37.6 18.7 23.6 PCTY 15.9 36.4 ОТС EMBX 136.5 18.9 59.5 Tech/Ops Sevcon, Inc. ARCADIS NV AMEX TO 23.2 20.7 35.7 ОТС ОТС ARCAF 173.4 8.8 9.6 XING EWST Qiao Xing Universal Tele. Energy West Incorporated Barnwell Industries, Inc. Innodata Corporation 64.3 22.1 30.8 ОТС 29.1 9.7 16.3 AMEX BRN 27.3 7.4 73.4 ОТС INOD 66.1 11.0 29.6 MDCI INMRY Medical Action Industries Instrumentarium Corp. Petroleum Development Drexler Technology Corp. Gerber Childrenswear Inc. Gaiam, Inc. Artesian Resources Corp. York Water Company OTC 137.1 240.9 26.9 3.6 30.6 ОТС 52.1 ОТС PETD 95.9 6.1 19.4 233.6 126.9 ОТС DRXR 45.6 53.6 NYSE GCW 7.9 25.8 GAIA ARTNA ОТС 295.5 62.8 68.2 20.5 60.7 ОТС 45.5 OTC YORW 92.2 22.9 74.2
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