condition mean min max ZT0-3 59.296549999999996 59.296549999999996 59.296549999999996 ZT4-7 47.3204 47.3204 47.3204 ZT8-11 54.21465 54.21465 54.21465 ZT12-15 55.6953 55.6953 55.6953 ZT16-19 52.8598 52.8598 52.8598 ZT20-23 73.3537 73.3537 73.3537