condition mean min max ZT0-3 32.3213962 22.99507349 41.64771891 ZT4-7 49.154707975 38.480309835 59.829106115 ZT8-11 136.95143949750002 93.09818459499999 180.80469440000002 ZT12-15 157.1329777775 109.148046405 205.11790915 ZT16-19 51.295011897500004 39.48223984 63.107783955 ZT20-23 12.082953878249999 6.8876647215 17.278243035