condition mean min max ZT0-3 715.4 715.4 715.4 ZT4-7 753.5 753.5 753.5 ZT8-11 626.55 626.55 626.55 ZT12-15 551.75 551.75 551.75 ZT16-19 542.35 542.35 542.35 ZT20-23 586.9 586.9 586.9