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

X 0 1 2 3 4 5 total

p(x) .10 .39 .27 .16 .05 .03 1.00

Calculate the mean and standard deviation. (Round your mean value to 2 decimal places and standard deviation to 3 decimal places.)

mean:

standard deviation:

.17, .18, is wrong for the mean

.675, .016, .159, .140 is wrong for standard deviation