condition mean min max ZT0-3 0.015547725 0.0 0.03109545 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0330316 0.0330316 0.0330316 ZT12-15 0.006329275 0.0 0.01265855 ZT16-19 0.057192 0.0 0.114384 ZT20-23 0 0 0