Discrete Probability Distributions/Probability Distributions Question 36 911 Calls

A 911 service center recorded the number of calls received per hour.  The number of calls per hour for one week can be approximated by the following probability distribution.  

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«math xmlns=¨http://www.w3.org/1998/Math/MathML¨»«mi»P«/mi»«mfenced»«mi»x«/mi»«/mfenced»«/math» #a #b #c #d #e #f #g #h

 

  1. Find the mean of the probability distribution to three significant digits.
    {#1}

  2. Find the variance of the probability distribution to three significant digits.
    {#2}

  3. Find the standard deviation of the probability distribution to three significant digits
    {#3}

  4. Find the expected value of the probability distribution to three significant digits.
    {#4}
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