One hospital in Ontario conducted a survey to monitor daily absenteeism at the hospital. The accompanying table describes the probability distribution for the emergency department at a hospital, where x represents the number of clinical personnel absent in the department in a given day. Find the mean and standard deviation of the absent personnel at the emergency room

x	P(X=x)
0	0.15
1	0.45
2	0.25
3	0.10
4	0.05
Total	1