The following data represent the number of appointments made per 15-minute interval by telephone solicitation for a lawn-care company. Assume these are population data.

Number of

Appointments Frequency of Occurrence

0-under 1 31

1-under 2 57

2-under 3 26

3-under 4 14

4-under 5 6

5-under 6 3

Calculate the median. (Round your answer to 3 decimal places.)

Calculate the variance. (Round your answer to 4 decimal places.)

Calculate the standard deviation (Round your answer to 4 decimal places.)