condition mean min max ZT0-3 86.236307 86.236307 86.236307 ZT4-7 103.95497499999999 103.95497499999999 103.95497499999999 ZT8-11 133.750526 133.750526 133.750526 ZT12-15 122.60933449999999 122.60933449999999 122.60933449999999 ZT16-19 93.64709500000001 93.64709500000001 93.64709500000001 ZT20-23 103.5347425 103.5347425 103.5347425