condition mean min max ZT0-3 4268.7 4268.7 4268.7 ZT4-7 2451.8 2451.8 2451.8 ZT8-11 2830.55 2830.55 2830.55 ZT12-15 3206.75 3206.75 3206.75 ZT16-19 3085.95 3085.95 3085.95 ZT20-23 4150.65 4150.65 4150.65