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Analyze Surveys & Samples Lesson 6.6 Page 359

Analyze Surveys & Samples Lesson 6.6 Page 359. Vocabulary :. Survey – A study of one or more characteristics of a group. Population – The entire group for which you want information. Sample – A part of the population.

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Analyze Surveys & Samples Lesson 6.6 Page 359

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  1. Analyze Surveys & SamplesLesson 6.6Page 359

  2. Vocabulary: Survey – A study of one or more characteristics of a group. Population – The entire group for which you want information. Sample – A part of the population. Random Sample – Every member of the population has an equal chance of being selected.

  3. More Vocabulary: Stratified Random Sample – Population is divided into distinct groups. Members are selected from each group. Systematic Sample – A rule is used to select members of a population. Convenience Sample – Only members of the population who are easily accessible are selected. Self-Selected Sample – Members of the population select themselves by volunteering.

  4. More Vocabulary: Representative Sample – A sample that accurately reflects the characteristics of a population. Biased Sample – A sample that is not representative of the population. Biased Question – A question that encourages a particular response.

  5. Example 1: Classify a sampling method • Library Surveys: A university is conducting a survey to determine whether a public library has hours of business that satisfy most of its patrons. At the library, students question every 10th patron who exits the library. • Identify the population • All library patrons • Classify the sampling method • Systematic Sample

  6. Example 2: Identify a potentially biased sample In Example 1, suppose the university students question 20 library patrons chosen at random on a Monday morning between 9 and 11 AM. Is this method likely to result in a representative sample or a biased sample? Biased Sample

  7. Example 3: Identify potentially biased questions • Tell whether the question is potentially biased. If the question is biased, rewrite it so that it is not. • Because there is a lack of affordable entertainment • for teenagers in the city, do you think the city • should sponsor more youth activities? • Biased…Do you think the city should sponsor more youth activities? • b. Do you think a new elementary school should be • built? • Not Biased

  8. Homework Assignment: Page: 361 #1, 4, and 7

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