Ch 5 Exercises Solutions
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AP Statistics Solutions to Packet 5
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Producing Data Designing Samples Designing Experiments Simulating Experiments
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HW #29 1 – 3, 5 - 7 5.1 FUNDING FOR DAY CARE A sociologist wants to know the opinions of employed adult women about government funding for day care. She obtains a list of the 520 members of a local business and professional women’s club and mails a questionnaire to 100 of these women selected at random. Only 48 questionnaires are returned. What is the population in this study? What is the sample? The population is employed adult women, the sample is the 48 club members who returned the survey.
5.2 WHAT IS THE POPULATION? For each of the following sampling situations identify the population as exactly as possible. That is, say what kind of individuals the population consists of and say exactly which individuals fall in the population. If the information given is not complete, complete the description of the population in a reasonable way. (a) Each week, the Gallup Poll questions a sample of about 1500 adult U. S. residents to determine national opinion on a wide variety of issues. An individual is a person; the population is all adult U.S. residents. (b) The 2000 census tried to gather basic information from every household in the United States. But a “long form” requesting much additional information was sent to a sample of about 17% of households. An individual is a household; the population is all U.S. households. (c) A machinery manufacturer purchases voltage regulators from a supplier. There are reports that variation in the output voltage of the regulators is affecting the performance of the finished products. To assess the quality of the supplier’s production, the manufacturer sends a sample of 5 regulators from the last shipment to a laboratory for study. An individual is a voltage regulator; the population is all the regulators in the last shipment.
5.3 TEACHING
AP Statistics Solutions to Packet 5
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Producing Data Designing Samples Designing Experiments Simulating Experiments
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HW #29 1 – 3, 5 - 7 5.1 FUNDING FOR DAY CARE A sociologist wants to know the opinions of employed adult women about government funding for day care. She obtains a list of the 520 members of a local business and professional women’s club and mails a questionnaire to 100 of these women selected at random. Only 48 questionnaires are returned. What is the population in this study? What is the sample? The population is employed adult women, the sample is the 48 club members who returned the survey.
5.2 WHAT IS THE POPULATION? For each of the following sampling situations identify the population as exactly as possible. That is, say what kind of individuals the population consists of and say exactly which individuals fall in the population. If the information given is not complete, complete the description of the population in a reasonable way. (a) Each week, the Gallup Poll questions a sample of about 1500 adult U. S. residents to determine national opinion on a wide variety of issues. An individual is a person; the population is all adult U.S. residents. (b) The 2000 census tried to gather basic information from every household in the United States. But a “long form” requesting much additional information was sent to a sample of about 17% of households. An individual is a household; the population is all U.S. households. (c) A machinery manufacturer purchases voltage regulators from a supplier. There are reports that variation in the output voltage of the regulators is affecting the performance of the finished products. To assess the quality of the supplier’s production, the manufacturer sends a sample of 5 regulators from the last shipment to a laboratory for study. An individual is a voltage regulator; the population is all the regulators in the last shipment.
5.3 TEACHING