Unit 3Ch. 5 Worksheet 1 – Sampling Techniques Name:

Tell whether the samples are simple random, stratified, voluntary response or convenience.

  1. Lucy wants to find out what type of music the majority of people in her city like. She was going to take a poll in front of a music store, but didn’t think that the sample would be large enough or that is would represent the population. Lucy decided to take a poll in front of the zoo instead. ______
  2. Michael has a long list of chores to do. He writes each chore on an index card, turns them over so he can’t see what chore it is, and then randomly flips over each card to figure out what order he will do his chores.

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  1. Carmen believes that people prefer chocolate ice cream over vanilla ice cream. She surveys people at the gas station to find out whether they like chocolate or vanilla ice cream.______
  2. Shoppers are offered a coupon for $5.00 off of their next purchase, if they fill out a quick survey on customer service. ______
  3. Charlie has 4 extra tickets to a baseball game. He has eight friends who would like to join him at the baseball game. He write each of their eight names on separate pieces of paper, places the paper in a hat, and then draws four names. ______
  4. Natalie wants to find out whether the girls at her summer camp like action movies as much as boys. She interviews 50 boys and 50 girls at camp.______

Extended Response

  1. A recent online poll posed the question: “Should female athletes be paid the same as men for the work they do?” In all, 13,147 (44%) said “Yes,” another 15,182 (50%) said “No,” and the remaining 1448 said “Don’t Know.”
  2. What is the sample size for this poll? ______
  1. That’s a much larger sample than standard sample surveys. In spite of this, we can’t trust the result to give good information about any clearly defined population. Why? ______

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  1. How much sleep do high school students get on a typical school night? An interested student designed a survey to find out. To make data collection easier, the student surveyed the first 100 students to arrive at school on a particular morning. These students reported an average of 7.2 hours of sleep on the previous night.
  2. What type of sample did the student obtain? ______
  1. Explain why this sampling method is biased. Is 7.2 hours probably higher or lower than the true average amount of sleep last night for all students at the school? Why?______

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