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the following table shows part of the probability distribution for the number of boats sold daily at boats unlimited . it is known that the

the following table shows part of the probability distribution for the number of boats sold daily at boats unlimited . it is known that the average numbers of boats sold daily is 1.57

x f(x)

0 0.20

1 0.30

2 0.31

3 0.11

4 0.05

5 0.02

compute the standard deviation for this probability distribution

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