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Do Now

Do Now.

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Do Now

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  1. Do Now • At a local coffee house, they have response cards on the table for anyone to fill out. On it, the customer may rank how good the service was, how good the food and coffee was, and how reasonable the prices are. After a month, the reports were overwhelmingly negative against everything and everyone. Should the owner of the coffee shop fire everyone, get different coffee, and lower prices?

  2. Objectives • 1.February.2011 • Students will be able to… • Identify errors in critical thinking.

  3. Agenda • Do Now (5 min) • Review Quiz (5 min) • Notes Discussion (20 min) • Hwork (5 min) • Exit Ticket (5 min)

  4. Quiz

  5. Do Now Revisited • A voluntary response surveyor a self-selected sample is one in which the respondents themselves decide whether to be included. • What does this mean? • What is an example of this?

  6. Self Selected Samples • How are they useful? • How are they not biased?

  7. Small Samples • If I were to say that 50% of the copiers in this building don’t work, what is wrong with this statement? • If I were to say that of 2500 students surveyed, 85% of them loved going to school. So school is doing a good job. What is wrong with this?

  8. Graphs • How does Nevada’s per capita income compare to California’s? • Nevada is much less than California • Nevada is a little less than California • They are more or less the same

  9. Graphs • How does Nevada’s per capita income compare to California’s? • Nevada is much less than California • Nevada is a little less than California • They are more or less the same

  10. Percentages • American Airlines lost 256 bags in September. In October, they improved their bag loss rate by 100%. How many bags did they lose in October?

  11. Loaded Questions • What is the difference between the following: • Should the president have the line item veto to eliminate waste? • Should the president have the line item veto or not? • Which will get more “Yes” responses?

  12. Order of Questions • Respondents to the question: • Would you say traffic contributes more to air pollution than industry? • Said 45% traffic, 27% industry. • Would you say industry contributes more to air pollution than traffic? • 57% industry, 24% traffic

  13. Nonresponse • The kind of people who will outright refuse to talk to pollsters are different from those who don’t. • Why might someone refuse to talk to a pollster?

  14. Hwork • Answer questions #9-26 on page 18.

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