condition mean min max ZT0-3 72.86763798749999 64.50863267 81.226643305 ZT4-7 118.97705284999999 100.48759005 137.46651565 ZT8-11 249.204855925 192.36856765 306.0411442 ZT12-15 198.5503744425 128.933234885 268.167514 ZT16-19 83.00619754 74.561970865 91.450424215 ZT20-23 61.033315515 58.065309819999996 64.00132121