condition mean min max ZT0-3 10.96211 9.78492 12.1393 ZT4-7 6.66881 6.66881 6.66881 ZT8-11 6.1599 6.1599 6.1599 ZT12-15 5.941375000000001 5.88841 5.99434 ZT16-19 8.611101666666666 7.67739 9.544813333333334 ZT20-23 0 0 0