condition mean min max ZT0-3 93.32444445666667 93.32444445666667 93.32444445666667 ZT4-7 68.35222222 68.35222222 68.35222222 ZT8-11 62.745 62.745 62.745 ZT12-15 88.02333332 88.02333332 88.02333332 ZT16-19 95.31444443333334 95.31444443333334 95.31444443333334 ZT20-23 97.35888889 97.35888889 97.35888889