condition mean min max ZT0-3 0.5133110000000001 0.5133110000000001 0.5133110000000001 ZT4-7 1.094061 1.094061 1.094061 ZT8-11 1.4035549999999999 1.4035549999999999 1.4035549999999999 ZT12-15 0.8644575 0.8644575 0.8644575 ZT16-19 0.6175515 0.6175515 0.6175515 ZT20-23 0.857747 0.857747 0.857747