condition mean min max ZT0-3 57.139532 57.139532 57.139532 ZT4-7 55.676454 55.676454 55.676454 ZT8-11 69.7143575 69.7143575 69.7143575 ZT12-15 66.668005 66.668005 66.668005 ZT16-19 65.244725 65.244725 65.244725 ZT20-23 71.50637950000001 71.50637950000001 71.50637950000001