Saturday, March 28, 2009

March 28, 2009, Quick Quiz

Quiz - True or False

1. The midpoint of a class is the sum of its lower and upper limits.

2. The cumulative frequency of a class is the sample size divided by the frequency of the
class.

3. Relative frequency is the portion of the data that falls in that class.
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16 comments:

  1. AlexMarch 28, 2009 at 8:11 AM

    1. False. It is the sum of the lower and upper limits divided by 2.

    2. False. It is the sum of the frequency of the class and all previous classes, which last class is equal to the sample size of N.

    3. True. To find relative frequency, divide class frequency by sample size or F/N.

    ReplyDelete
  2. karolynMarch 28, 2009 at 9:48 AM

    1.) false

    2.) false

    3.) true

    ReplyDelete
  3. BryanMarch 28, 2009 at 9:49 AM

    1) False
    2) False
    3) True

    ReplyDelete
  4. SheilaMarch 28, 2009 at 11:05 AM

    1)false
    2)false
    3) true

    ReplyDelete
  5. UnknownMarch 28, 2009 at 11:07 AM

    1. False
    2. False
    3. True

    ReplyDelete
  6. UnknownMarch 28, 2009 at 11:07 AM

    1) False

    2) False

    3) True

    ReplyDelete
  7. JustinMarch 28, 2009 at 11:12 AM

    1. False

    2. False

    3. True

    ReplyDelete
  8. AnonymousMarch 28, 2009 at 11:29 AM

    Evan-

    1. False, because you have to divide by two
    2. False, and all previous classes
    3. True

    ReplyDelete
  9. AnonymousMarch 29, 2009 at 11:05 AM

    Mel Bailey

    1. F
    2. F
    3. T

    ReplyDelete
  10. UnknownMarch 29, 2009 at 8:58 PM

    1. False, it is the difference between the two. (UL+LL)/2
    2. False, it is the frequency of the class in addition to the frequencies of all classes prior.
    3. True.

    ReplyDelete
  11. rickApril 2, 2009 at 11:16 AM

    1. The midpoint of a class is the sum of its lower and upper limits.

    False - it is the sum of the lower and upper limits devided by 2.

    2. The cumulative frequency of a class is the sample size divided by the frequency of the
    class.

    False - the cuminated frequency of a class is the is the sum of the frequency for that class and all previous classes.

    3. Relative frequency is the portion of the data that falls in that class.

    True

    ReplyDelete
  12. AnonymousApril 2, 2009 at 1:42 PM

    John Drake

    1. F
    2. F
    3. T

    ReplyDelete
  13. AnonymousApril 3, 2009 at 7:58 PM

    Tonya

    1. False

    2. False

    3. True

    ReplyDelete
  14. JWheelsApril 3, 2009 at 9:16 PM

    1. False
    The midpoint of a class is the sum of the lower and upper limits of the class of data divided by two. The midpoint is sometimes called the class mark.

    2. False
    The cumulative frequency of a class is the sum of the frequency for that class and all previous classes. The cumulative frequency of the last class is equal to the sample size n.

    3. True
    The relative frequency of a class is the portion or percentage of the data that falls in that class. To find the relative frequency of a class, divide the frequency f by the sample size n.

    Book:
    Elementary Statistics Picturing the World
    By: Larson and Farber
    Page: 36

    ReplyDelete
  15. UnknownApril 4, 2009 at 11:21 AM

    rick said
    false

    false

    true

    ReplyDelete
  16. UnknownApril 4, 2009 at 11:26 AM

    Rick O'Neil

    False
    False
    True

    ReplyDelete

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