condition mean min max ZT0-3 322.4 322.4 322.4 ZT4-7 535.8 535.8 535.8 ZT8-11 452.70000000000005 452.70000000000005 452.70000000000005 ZT12-15 551.95 551.95 551.95 ZT16-19 453.75 453.75 453.75 ZT20-23 429.1 429.1 429.1