condition mean min max ZT0-3 5.414007499999999 4.5744299999999996 6.253584999999999 ZT4-7 2.0597125 2.0597125 2.0597125 ZT8-11 4.378595000000001 4.378595000000001 4.378595000000001 ZT12-15 0 0 0 ZT16-19 6.2299 6.2299 6.2299 ZT20-23 4.59972 4.59972 4.59972