hw1.solu

hw1.solu - STA 13A Spring 2010 Selected Solutions to HW 1...

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1 STA 13A Spring 2010 Selected Solutions to HW 1 Thomas Lee 1.1 a The experimental unit, the individual or object on which a variable is measured, is the student. b The experimental unit on which the number of errors is measured is the exam. c The experimental unit is the patient. d The experimental unit is the azalea plant. e The experimental unit is the car. 1.2 a “Time to assemble” is a quantitative variable because a numerical quantity (1 hour, 1.5 hours, etc.) is measured. b “Number of students” is a quantitative variable because a numerical quantity (1, 2, etc.) is measured. c “Rating of a politician” is a qualitative variable since a quality (excellent, good, fair, poor) is measured. d “State of residence” is a qualitative variable since a quality (CA, MT, AL, etc. ) is measured. 1.3 a “Population” is a discrete variable because it can take on only integer values. b “Weight” is a continuous variable, taking on any values associated with an interval on the real line.

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This note was uploaded on 10/06/2010 for the course NUT 10 taught by Professor Lizapplegates during the Fall '10 term at UC Merced.

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hw1.solu - STA 13A Spring 2010 Selected Solutions to HW 1...

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