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On the midnight shift the number of patients with head trauma in an emergency room has the probability distribution shown below. Calculate the standard deviation

On the midnight shift the number of patients with head trauma in an emergency room has the probability distribution shown below. Calculate the standard deviation and mean. (round your mean value to 2 decimal places, and standard deviation to 3 decimal places

x 0 1 2 3 4 5 total

P(x) 0.9 .32 .27 .17 .11 .04 1.00

mean=?

standard deviation=?

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