A company is studying the number of monthly absences among its 125 employees.

Number of Days Absent Probability

0 0.60

1 0.20

2 0.12

3 0.04

4 0.04

5 0.00

The following probability distribution shows the likelihood that people were absent 0, 1, 2, 3, 4, or 5 days last month.

What is the standard deviation of the number of days absent?

01.65951.07781.1616