condition mean min max ZT0-3 1.36245 1.27657 1.44833 ZT4-7 1.3323005 1.3323005 1.3323005 ZT8-11 1.113955 1.113955 1.113955 ZT12-15 0 0 0 ZT16-19 2.2329849999999998 2.2329849999999998 2.2329849999999998 ZT20-23 3.64424 3.64424 3.64424