condition mean min max ZT0-3 1.366835 1.267435 1.4662350000000002 ZT4-7 1.4965950000000001 1.4965950000000001 1.4965950000000001 ZT8-11 1.190338 1.190338 1.190338 ZT12-15 0 0 0 ZT16-19 1.26113 1.26113 1.26113 ZT20-23 1.642715 1.642715 1.642715