condition mean min max ZT0-3 0.9109965 0.9109965 0.9109965 ZT4-7 0.7065144999999999 0.7065144999999999 0.7065144999999999 ZT8-11 1.0654 1.0654 1.0654 ZT12-15 1.0261974999999999 1.0261974999999999 1.0261974999999999 ZT16-19 1.35752 1.35752 1.35752 ZT20-23 0.956987 0.956987 0.956987