Probability Distribution Quiz Exam!

10 Questions | Total Attempts: 89

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Probability Distribution Quiz Exam!

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Questions and Answers
  • 1. 
    The probability distribution of a discrete random variable.
    • A. 

      Probability mass function (pmf)

    • B. 

      Probability density function (pdf)

    • C. 

      Cumulative distribution function (pmf)

  • 2. 
    The probability distribution of a continuous variable.
    • A. 

      Probability mas function (pmf)

    • B. 

      Probability density function (pdf)

    • C. 

      Cumulative distribution function (cdf)

  • 3. 
    The probability that the variable takes a value less than or equal to x.
    • A. 

      Probability mass function (pmf)

    • B. 

      Probability density function (pdf)

    • C. 

      Cumulative distribution function (cdf)

  • 4. 
    The values of the discrete random variable X where f(x) > 0 
    • A. 

      Support S

    • B. 

      Expected value

    • C. 

      Mass points

  • 5. 
    The set of values that that the random variable can take__________
    • A. 

      Expected value

    • B. 

      Mass points

    • C. 

      Support S

  • 6. 
    The weighted average of the elements of a probability distribution.
    • A. 

      Expected value

    • B. 

      Support S

    • C. 

      Mass points

  • 7. 
    A random variable X has a probability distribution as follows x 0 1 2 3 4 P(x) 0.06 0.23 k 0.35 0.05 Find P(2)
    • A. 

      0.30

    • B. 

      0.31

    • C. 

      0.23

    • D. 

      0.13

  • 8. 
    Using table in #7 What is P(x>2)
    • A. 

      0.35

    • B. 

       0.40

    • C. 

      0.71

    • D. 

      0.75

  • 9. 
    The probability distribution of a discrete random variable is shown in the table below x 1 2 3 4 5 P(x) 2/25 6/25 2/5 4/25 3/5d Find d
    • A. 

      1/5

    • B. 

      5

    • C. 

      2

    • D. 

      3/25

  • 10. 
        Given the histogram above, What is  P (x < 3)?
    • A. 

      0.2500

    • B. 

      0.6875

    • C. 

      0.7125

    • D. 

      Option 4

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