condition mean min max ZT0-3 4.537990000000001 4.537990000000001 4.537990000000001 ZT4-7 4.40123 4.40123 4.40123 ZT8-11 0.9185455 0.9185455 0.9185455 ZT12-15 0.349515 0.349515 0.349515 ZT16-19 1.4359250000000001 1.4359250000000001 1.4359250000000001 ZT20-23 1.685355 1.685355 1.685355