Practice - McGraw-Hill Higher Education

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12-1NAME______________________________________________ DATE______________ PERIOD _____PracticeSampling and BiasIdentify each sample, suggest a population from which it was selected, and statewhether it is unbiased (random) or biased. If unbiased, classify the sample as simple,stratified, or systematic. If biased, classify as convenience or voluntary response.1. GOVERNMENT At a town council meeting, the chair asks 5 citizens attending for theiropinions on whether to approve rezoning for a residential area.2. BOTANY To determine the extent of leaf blight in the maple trees at a nature preserve,a botanist divides the reserve into 10 sections, randomly selects a 200-foot by 200-footsquare in the section, and then examines all the maple trees in the section.3. FINANCES To determine the popularity of online banking in the United States, apolling company sends a mail-in survey to 5000 adults to see if they bank online, and ifthey do, how many times they bank online each month.Lesson 12-14. SHOES A shoe manufacturer wants to check the quality of its shoes. Every twentyminutes, 20 pairs of shoes are pulled off the assembly line for a thorough qualityinspection.Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.5. BUSINESS To learn which benefits employees at a large company think are mostimportant, the management has a computer select 50 employees at random. Theemployees are then interviewed by the Human Relations department.6. BUSINESS An insurance company checks every hundredth claim payment to ensurethat claims have been processed correctly.7. ENVIRONMENT Suppose you want to know if a manufacturing plant is dischargingcontaminants into a local river. Describe an unbiased way in which you could check theriver water for contaminants.8. SCHOOL Suppose you want to know the issues most important to teachers at yourschool. Describe an unbiased way in which you could conduct your survey.Chapter 12 9 Glencoe Algebra 1
12-2NAME______________________________________________ DATE______________ PERIOD _____PracticeCounting OutcomesDraw a tree diagram to show the sample space for each event. Determine thenumber of possible outcomes.1. dining at an Italian, Mexican, or French restaurant, for lunch, early bird (early dinnerspecial), or dinner, and with or without dessertFind the value of each expression.2. 5! 3. 8! 4. 10! 5. 12!6. How many different vacation plans are possible when choosing one each of12 destinations, 3 lengths of stay, 5 travel options, and 4 types of accommodations?7. How many different ways can you arrange your work if you can choose from 7 weeklyschedules, 6 daily schedules, and one of 3 types of duties?8. How many different ways can you treat a minor cut if you can choose from 3 methods ofcleansing the cut, 5 antibiotic creams, 2 antibacterial sprays, and 6 types of bandages?9. TESTING A teacher gives a quick quiz that has 4 true/false questions and 2 multiplechoice questions, each of which has 5 answer choices. In how many ways can the quiz beanswered if one answer is given for each question?CLASS RINGS Students at Pacific High can choose class rings in one each of8 styles, 5 metals, 2 finishes, 14 stones, 7 cuts of stone, 4 tops, 3 printing styles, and30 inscriptions.10. How many different choices are there for a class ring?11. If a student narrows the choice to 2 styles, 3 metals, 4 cuts of stone, and 5 inscriptions(and has already made the remaining decisions), how many different choices for a ringremain?Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.Chapter 12 16 Glencoe Algebra 1
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Practice - McGraw-Hill Higher Education

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