condition mean min max ZT0-3 0.8807332635 0.841994977 0.9194715499999999 ZT4-7 0.9495281857500001 0.757660744 1.1413956275000001 ZT8-11 1.72474980525 1.3012086100000002 2.1482910005 ZT12-15 1.9737448745 1.721483308 2.226006441 ZT16-19 1.4268375055 1.1072954265 1.7463795844999999 ZT20-23 1.9129785507500001 1.776310096 2.0496470055000002