condition mean min max ZT0-3 112.16329999999999 108.1411 116.1855 ZT4-7 176.7785 176.7785 176.7785 ZT8-11 30.474249999999998 30.474249999999998 30.474249999999998 ZT12-15 0 0 0 ZT16-19 24.97375 24.97375 24.97375 ZT20-23 62.263850000000005 62.263850000000005 62.263850000000005