### What is the expected number of service calls

Assignment Help Basic Statistics
##### Reference no: EM1319185

Expected value, variance and standard deviation.

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 Number of service calls Probability 0 0.1 3 0.2 1 0.15 4 0.15 2 0.3 5 0.1

a)    What is the expected number of service calls?

b)   What is the variance in the number of service calls?  What is the standard deviation?

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