condition mean min max ZT0-3 642.5215000000001 615.3605 696.124 ZT4-7 670.4235 670.4235 670.4235 ZT8-11 663.445 663.445 663.445 ZT12-15 684.52025 650.884 718.1565 ZT16-19 631.6415 631.6415 631.6415 ZT20-23 551.694 551.694 551.694