condition mean min max ZT0-3 304.8508333333333 235.35399999999998 348.1445 ZT4-7 205.572 205.572 205.572 ZT8-11 184.7455 184.7455 184.7455 ZT12-15 218.33675 215.137 221.5365 ZT16-19 235.781 235.781 235.781 ZT20-23 326.1435 326.1435 326.1435