On the midnight shift the number of patients with head trauma in an emergency room has the probability distribution shown below P( .02 1 38 2 125 4 13 5 05 20 Total 1.80 (m) Calculate the mean and standard deviation (Round your mean value to 2 decimal places and standard deviation to 3 decimal places.) Mean Standard deviation (b) Describe the shape of this distribution Skewed to the right Skewed to the len Symmetric