What is the expected number of service calls

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?

Reference no: EM1319185

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