Solution Manual for A Second Course in Statistics: Regression Analysis, 8th Edition

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Chapter 11-1A Review of Basic Concepts(Optional)1.1a.High school GPA is a number usually between 0.0 and 4.0. Therefore, it is quantitative.b.Country of citizenship: USA, Japan, etc. is qualitative.c.The scores on the SAT's are numbers between 200 and 800. Therefore, it is quantitative.d.Gender is either male or female. Therefore, it is qualitative.e.Parent's income is a number: $25,000, $45,000, etc. Therefore, it is quantitative.f.Age is a number: 17, 18, etc. Therefore, it is quantitative.1.2a.The experimental units are the new automobiles. The model name, manufacturer, type oftransmission, engine size, number of cylinders, estimated city miles/gallon, and estimatedhighway miles/gallon are measured on each automobile.b.Model name, manufacturer, and type of transmission are qualitative. None of these ismeasuredon a numerical scale. Engine size, number of cylinders, estimated citymiles/gallon, and estimated highway miles/gallon are all quantitative. Each of thesevariables is measured on a numerical scale.1.3Both the variables current position and type of organization are qualitative. The variable years ofexperience is quantitative because it is measured on a numerical scale.1.4The experimental units are the operational satellites currently in orbit around Earth. Thevariables country of operator/owner, primary use, and class of orbit are all qualitative becausenone are measured on a numerical scale. The variables longitudinal position, apogee, launchmass, usable electric power, and expected lifetime are all quantitative variables. All of thesevariables are measured on a numerical scale.1.5a.Species of sea buckthorn is a qualitative variable.b.Altitude of collection location is a quantitative variable.c.Total flavonoid content in berries is a quantitative variable.1.6Gender and level of education are both qualitative since neither is measured on a numerical scale.Age, income, job satisfaction score, and Machiavellian rating score are all quantitative since theycan be measured on a numerical scale.1.7a.The population of interest is all decision makers. The sample set is 155 volunteer students.Variables measured were the emotional state and whether to repair a very old car (yes orno).b.Subjects in the guilty-state group are less likely to repair an old car.Chapter1

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