condition mean min max ZT0-3 0.0 0.0 0.0 ZT4-7 0.0 0.0 0.0 ZT8-11 0.04725193716666667 0.0 0.09450387433333333 ZT12-15 0.0456764815 0.0 0.091352963 ZT16-19 0.008906312000000001 0.0 0.017812624000000003 ZT20-23 0.04062016683333333 0.017668348 0.06357198566666666