condition mean min max ZT0-3 51.421987605 46.63622986 56.20774535 ZT4-7 62.33934544 60.48448534 64.19420554 ZT8-11 64.832716475 63.72620106 65.93923189 ZT12-15 92.61028744999999 85.08041801333333 100.14015688666666 ZT16-19 96.41090255166667 94.85656554666666 97.96523955666667 ZT20-23 87.14317905 86.61288418333334 87.67347391666667