condition mean min max ZT0-3 4410.6 4410.6 4410.6 ZT4-7 4142.5 4142.5 4142.5 ZT8-11 3434.1 3434.1 3434.1 ZT12-15 2524.85 2524.85 2524.85 ZT16-19 3014.8999999999996 3014.8999999999996 3014.8999999999996 ZT20-23 3989.1000000000004 3989.1000000000004 3989.1000000000004