condition mean min max ZT0-3 439.8 439.8 439.8 ZT4-7 382.4 382.4 382.4 ZT8-11 385.9 385.9 385.9 ZT12-15 467.0 467.0 467.0 ZT16-19 551.15 551.15 551.15 ZT20-23 485.35 485.35 485.35