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9-1. Samples and Surveys. Course 3. Warm Up. Problem of the Day. Lesson Presentation. 9-1. Samples and Surveys. x. –3. Course 3. Warm Up Evaluate. 1. t + 15 for t = –5 2. n + (–13) for n = 7 Solve for x . 3. = –21 4. 7 x = –98. 10. –6. x = 63. x = –14. 9-1.

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9-1

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  1. 9-1 Samples and Surveys Course 3 Warm Up Problem of the Day Lesson Presentation

  2. 9-1 Samples and Surveys x –3 Course 3 Warm Up Evaluate. 1.t + 15 for t = –5 2.n + (–13) for n = 7 Solve for x. 3. = –21 4. 7x = –98 10 –6 x = 63 x = –14

  3. 9-1 Samples and Surveys Course 3 Problem of the Day Mr. Gray’s 29 students will be sitting in the gym to watch a play. There are two rows of five chairs, three rows of four chairs, and four rows of two chairs. Is there enough room for all the students to sit? yes

  4. 9-1 Samples and Surveys Course 3 Learn to identify sampling methods and to recognize biased samples.

  5. 9-1 Samples and Surveys Course 3 Insert Lesson Title Here Vocabulary population sample randomsample systematic sample stratified sample convenience sample voluntary-response sample biasedsample

  6. 9-1 Samples and Surveys Course 3 1.) Runner’s World magazine wants to know how many miles the average American runs per week. They ask their readers to fill out a survey and send it in.

  7. 9-1 Samples and Surveys Course 3 2.) A record store manager asks customers who make a purchase how many hours of music they listen to each day.

  8. 9-1 Samples and Surveys Course 3 3.) An eighth-grade student council member polls classmates about a new school mascot.

  9. 9-1 Samples and Surveys Course 3 4.) The first 5 people leaving a movie theater at a sneak preview were asked how they liked the movie.

  10. 9-1 Samples and Surveys Course 3 5.) Mrs. Flesch wants to know what 8th graders plan to do after high school. She surveys the 8th grade honor roll students. She asks them if they plan to go to college or start working right after high school.

  11. 9-1 Samples and Surveys Course 3 5.) A radio DJ for KJJY (Country Music) wants to know if people like his morning show line-up. The DJ asks for people to call in and give their opinion.

  12. 9-1 Samples and Surveys Course 3 5.) The mayor of Des Moines wants to know if residents want to use tax dollars to create new parks. The mayor goes to various parks in Des Moines and surveys people he meets.

  13. 9-1 Samples and Surveys Course 3 5.) The mayor of Des Moines wants to know if residents want to use tax dollars to create new parks. The mayor goes to various parks in Des Moines and surveys people he meets.

  14. 9-1 Samples and Surveys Course 3 Insert Lesson Title Here Identify the population and sample. Give a reason why the sample could be biased. 1. A high school principal asks the first three people who leave the school play whether they liked it. People that enjoy a play may not leave as early as someone who didn’t. The first 3 people leaving People who attended the play

  15. 9-1 Samples and Surveys Course 3 Insert Lesson Title Here Lesson Quiz: Part II Identify the sampling method used. 2. At a baseball game, 10 sections are chosen at random and 10 random people from each section are polled. 3. A telemarketer calls the people that have a last name beginning with H. stratified systematic

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