condition mean min max ZT0-3 720.684331 720.684331 720.684331 ZT4-7 806.764205 806.764205 806.764205 ZT8-11 1110.1184245 1110.1184245 1110.1184245 ZT12-15 1106.6587494999999 1106.6587494999999 1106.6587494999999 ZT16-19 725.474592 725.474592 725.474592 ZT20-23 589.7351645 589.7351645 589.7351645