condition mean min max ZT0-3 168.549 164.505 172.59300000000002 ZT4-7 183.06099999999998 183.06099999999998 183.06099999999998 ZT8-11 186.382 186.382 186.382 ZT12-15 0 0 0 ZT16-19 219.36599999999999 219.36599999999999 219.36599999999999 ZT20-23 228.27949999999998 228.27949999999998 228.27949999999998