condition mean min max ZT0-3 5.79236 4.097910000000001 7.48681 ZT4-7 6.206415 6.206415 6.206415 ZT8-11 3.073195 3.073195 3.073195 ZT12-15 0 0 0 ZT16-19 5.538365000000001 5.538365000000001 5.538365000000001 ZT20-23 9.65375 9.65375 9.65375