condition mean min max ZT0-3 59.540099999999995 55.64575 63.43445 ZT4-7 55.95905 55.95905 55.95905 ZT8-11 53.50895 53.50895 53.50895 ZT12-15 0 0 0 ZT16-19 36.9217 36.9217 36.9217 ZT20-23 48.61435 48.61435 48.61435