condition mean min max ZT0-3 10.694517 10.694517 10.694517 ZT4-7 10.284780000000001 10.284780000000001 10.284780000000001 ZT8-11 10.889348 10.889348 10.889348 ZT12-15 10.6901395 10.6901395 10.6901395 ZT16-19 11.232362 11.232362 11.232362 ZT20-23 12.4253125 12.4253125 12.4253125