condition mean min max ZT0-3 4.8398725 4.29055 5.389195 ZT4-7 10.187570000000001 10.187570000000001 10.187570000000001 ZT8-11 11.529050000000002 11.529050000000002 11.529050000000002 ZT12-15 0 0 0 ZT16-19 9.37285 9.37285 9.37285 ZT20-23 9.114184999999999 9.114184999999999 9.114184999999999