condition mean min max ZT0-3 11.116556 11.116556 11.116556 ZT4-7 11.143208000000001 11.143208000000001 11.143208000000001 ZT8-11 10.365520499999999 10.365520499999999 10.365520499999999 ZT12-15 12.3424385 12.3424385 12.3424385 ZT16-19 11.520499000000001 11.520499000000001 11.520499000000001 ZT20-23 9.804265000000001 9.804265000000001 9.804265000000001