| *(1) |
Calculation of the average based on the following figures:
0 most none
15 less than 30 minutes
45 less than 30 minutes to 1 hour
90 less than 1 to 2 hours
150 less than 2 to 3 hours
210 over 3 hours |
| *(2) |
Calculation of the average based on the following figures:
0 none
15 less than 30 minutes
60 about 1 hour
120 about 2 hours
180 more than 3 hours |
| *(3) |
Calculation of the average using the time as it is (i.e., about 9 means 9 p.m.) |
| *(4) |
Calculation of the average based on the following figures:
210 less than 4 hours
270 less than 4 to 5 hours
330 less than 5 to 6 hours
390 less than 6 to 7 hours
450 less than 7 to 8 hours
510 more than 8 hours |