Intro to Probability & Stats

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Author:
ju1iet
ID:
3937
Filename:
Intro to Probability & Stats
Updated:
2010-01-10 01:06:37
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Week One Interactive Activity
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Flashcards used created by professor to study chapter 1
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  1. What sampling method is used?

    A statistician who makes a research on automobile performance collects
    information on American, Japanese, and European automobiles separately
    to combine the results in the end.
    Stratified
  2. What sampling method is used?

    An inspector team from
    Department of Education needs to inspect middle schools in a large
    city. They choose at random 10 schools and then come to each of them to
    inspect each class.
    Cluster
  3. What sampling method is used?

    An inspector came to a public
    school to survey the teachers. She comes to the teacher lounge during
    the lunch break and talks with every present teacher.
    Convenience
  4. What sampling method is used?

    A quality control manager picks every 100th soda can, opens it and measures the amount of drink in it.
    Systematic
  5. Is this an observational or an experimental study?

    A farmer applies several new fertilizers to fruit trees to find out which of them is the most efficient.
    Experimental
  6. Is this an observational or an experimental study?

    A zoologist counts the bees visiting a rose bush during a 3 - hour period.
    Observational
  7. What level of measurement is this?

    The letter grades: A, B, C, D, F.
    Ordinal

    The data can be arranged in a logical order, but the intervals between them cannot be definded.
  8. What level of measurement is this?

    The number of passengers in a bus.
    Ratio

    We can compare the numbers of passengers in different buses by dividing one by the other.
  9. What level of measurement is this?

    Your age.
    Ratio

    We can compare two person's ages by dividing one by the other.
  10. What level of measurement is this

    Your year of birth.
    Interval

    • Years of birth can be compared by subtraction but
    • not by division, since there is no natural zero. (Each calendar has it
    • different.)
  11. What level of measurement is this?

    Numerical equivalents of school grades (4 for A, 3 for b, 2 for C etc.)
    Interval

    Grades can be compared by subtraction, but dividing them by each other makes no sense.
  12. What level of measurement is this?

    The number of teeth in an animals's mouth
    Ratio

    We can compare the numbers of teeth by dividing one by the other.
  13. What level of measurement is this?

    A car's maximum speed.
    Ratio

    We can compare two car's maximum speeds by dividing one by the other.
  14. What level of measurement is this?

    A girl's hair color.
    Nominal

    Colors are always at the nominal level.
  15. What level of measurement is this?

    Your e-mail address
    What level of measurement is this?

    Your e-mail address
  16. What level of measurement is this?

    Condition of a knife (sharp, dull, jagged).
    Ordinal

    The data can be arranged in a logical order, but the intervals between them cannot be defined.

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