condition mean min max ZT0-3 6796.450000000001 6796.450000000001 6796.450000000001 ZT4-7 11682.7 11682.7 11682.7 ZT8-11 10836.15 10836.15 10836.15 ZT12-15 9195.15 9195.15 9195.15 ZT16-19 7287.299999999999 7287.299999999999 7287.299999999999 ZT20-23 6756.35 6756.35 6756.35