condition mean min max ZT0-3 9.853027 9.853027 9.853027 ZT4-7 9.982086500000001 9.982086500000001 9.982086500000001 ZT8-11 9.765526999999999 9.765526999999999 9.765526999999999 ZT12-15 8.3898865 8.3898865 8.3898865 ZT16-19 9.468692 9.468692 9.468692 ZT20-23 10.326317 10.326317 10.326317