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Use the following scenario to answer the next 3 questions. A volunteer ambulance service handles 0 to 5 service calls on any given day.

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Use the following scenario to answer the next 3 questions. A volunteer ambulance service handles 0 to 5 service calls on any given day. The probability distribution for the number of service calls is as follows.

Number of service calls probability
0 .10
1 .15
2 .30
3 .20
4 .15
5 .10
12) What is the expected number of service calls?



13) What is the variance in the number of service calls?



14) What is the standard deviation?

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This question was asked on Jan 28, 2013 and answered on Jan 28, 2013.

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