Friday, April 10, 2009

April 11, 2009 - Quick "T & F" Quiz

True or False

1. The expected value of a discrete random variable is equal to the mean of the random variable.

2. Continuous random variables represent countable data, and discrete random variables represent
uncountable data.

3. It is possible for the sum of all probabilities of a random variable to exceed 1.

4. A binomial experiment is repeated for a fixed number of trials, and each trial is dependent on
the other trials.

5. There are only two possible outcomes—success and failure—from a binomial experiment.
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16 comments:

  1. AlexApril 11, 2009 at 8:04 AM

    1.T

    2.F, Other way around

    3.F, they can only be less than or equal to 1

    4.T

    5.T

    ReplyDelete
  2. UnknownApril 11, 2009 at 9:17 AM

    Rick O'Neil

    1. t
    2. f
    3. t
    4. t
    5. t

    ReplyDelete
  3. AnonymousApril 11, 2009 at 9:27 AM

    Tonya
    1. T
    2. F
    3. T
    4. F
    5. T

    ReplyDelete
  4. BryanApril 11, 2009 at 10:02 AM

    1) True
    2) False
    3) False, it has to equal 1.
    4) False
    5) True

    ReplyDelete
  5. karolynApril 11, 2009 at 10:06 AM

    1.)true
    2.)false
    3.)false
    4.)false
    5.)true

    ReplyDelete
  6. SheilaApril 11, 2009 at 10:13 AM

    1.) T
    2.) F
    3.) F It has to equal 1.
    4.) F
    5.) T

    ReplyDelete
  7. UnknownApril 11, 2009 at 10:23 AM

    1. True
    2. False, They need to be the other way around.
    3. False, The variable has to be equal to one.
    4. False
    5. True

    ReplyDelete
  8. UnknownApril 11, 2009 at 10:42 AM

    1. T
    2. F
    3. F
    4. F
    5. T

    ReplyDelete
  9. JustinApril 11, 2009 at 10:44 AM

    1.True

    2.False

    3.False these are to equal 1

    4.Fasle each trial is independent of other trials

    5.True This is one of the 4 conditions of binomial experiments.

    ReplyDelete
  10. JWheelsApril 11, 2009 at 10:45 AM

    1. T p.178
    2. F p.172
    3. F because a probability is a number representative of 100 or a %. p.117

    4. F p.184
    5. T p.184

    ReplyDelete
  11. UnknownApril 11, 2009 at 10:46 AM

    1. True
    2. False
    3. False
    4. False - independant
    5. True

    ReplyDelete
  12. GMeyersApril 11, 2009 at 10:58 AM

    1. T(p.178)
    2. F(p.172)
    3. F(p.173; The sum of all probabilities in a discrete variable may not exceed 1.)
    4. F(p.184; Each trial must be independent of each other trial.)
    5. T(p.184)

    ReplyDelete
  13. AnonymousApril 11, 2009 at 11:16 AM

    John Drake

    1. False
    2. False
    3. True, provided it is not a part of a discrete probability distribution.
    4. False
    5. True

    ReplyDelete
  14. AnonymousApril 11, 2009 at 11:28 AM

    Mel Bailey

    1. True
    2. False
    3. False
    4. False
    5. True

    ReplyDelete
  15. AnonymousApril 11, 2009 at 11:29 AM

    Evan Dossey-

    1. True
    2. False
    3. False, the sum of all prob. is 1
    4. False, independent of other trials
    5. True

    ReplyDelete
  16. rickApril 11, 2009 at 11:31 AM

    1. True
    2. False
    3. True
    4. False
    5. True

    ReplyDelete

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