condition mean min max ZT0-3 10.0655 10.0655 10.0655 ZT4-7 7.192405 7.192405 7.192405 ZT8-11 5.93142 5.93142 5.93142 ZT12-15 4.949275 4.949275 4.949275 ZT16-19 7.771694999999999 7.771694999999999 7.771694999999999 ZT20-23 7.85678 7.85678 7.85678