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4.A small startup tech company has 4 customer service telephone lines. Let denote the number of phone lines in use at any given time. Suppose
4.A small startup tech company has 4 customer service telephone lines. Let denote
the number of phone lines in use at any given time. Suppose that the probability distribution of is as follows:
=0 1 2 3 4
()= 0.10 0.16 a 0.31 0.22
a.)Determine the value of if the data above represent a discrete probability
distribution.
b.) Calculate and interpret the expected value of .
c.) Calculate the standard deviation of .
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