condition mean min max ZT0-3 301.53975 300.69050000000004 302.389 ZT4-7 270.2125 270.2125 270.2125 ZT8-11 198.64600000000002 198.64600000000002 198.64600000000002 ZT12-15 0 0 0 ZT16-19 267.183 267.183 267.183 ZT20-23 344.4285 344.4285 344.4285