condition mean min max ZT0-3 1.21659264425 0.21129709600000002 2.2218881925 ZT4-7 9.768634541499999 8.99089904 10.546370043 ZT8-11 9.11503289675 8.652373442 9.5776923515 ZT12-15 26.88187748375 17.0156008325 36.748154135 ZT16-19 78.771290725 61.55044476 95.99213669 ZT20-23 156.19175565 120.5544511 191.82906020000001