condition mean min max ZT0-3 32.67713333333333 26.56515 41.87565 ZT4-7 50.4958 50.4958 50.4958 ZT8-11 42.91185 42.91185 42.91185 ZT12-15 47.761875 44.438 51.08575 ZT16-19 36.970600000000005 36.970600000000005 36.970600000000005 ZT20-23 32.42405 32.42405 32.42405