condition mean min max ZT0-3 9.09549 9.09549 9.09549 ZT4-7 7.59455 7.59455 7.59455 ZT8-11 5.029210000000001 5.029210000000001 5.029210000000001 ZT12-15 7.614765 7.614765 7.614765 ZT16-19 12.839649999999999 12.839649999999999 12.839649999999999 ZT20-23 9.386835000000001 9.386835000000001 9.386835000000001