Table 1.

The median and interquartile range (reflecting accuracy of estimation) of the time delay τ

	τ (min)
Subject number	Median	25% percentile	75% percentile
1	16.1	15.5	16.8
2	15.2	14.7	15.6
3	15.6	14.6	16.8
4	15.7	14.5	16.9
5	19.9	19.4	20.4
6	14.3	13.8	14.9
7	16.7	16.2	17.1
8	16.8	16.0	17.6
9	21.4	20.2	22.5
10	10.8	10.4	11.2
11	14.2	13.9	14.5
12	16.2	15.4	17.0
Population	15.8	15.2	16.5

Individual and population estimates are shown.