condition mean min max ZT0-3 532.45 532.45 532.45 ZT4-7 688.4 688.4 688.4 ZT8-11 762.55 762.55 762.55 ZT12-15 884.75 884.75 884.75 ZT16-19 855.9000000000001 855.9000000000001 855.9000000000001 ZT20-23 751.5999999999999 751.5999999999999 751.5999999999999