condition mean min max ZT0-3 13.575018087 9.980560574 17.1694756 ZT4-7 78.5389281975 43.700424135 113.37743225999999 ZT8-11 318.82972600000005 231.34758200000005 406.31187000000006 ZT12-15 170.676887425 61.22690593 280.12686892 ZT16-19 34.3202535575 24.70774874 43.932758375000006 ZT20-23 7.2346388802499995 4.2470694415 10.222208319