condition mean min max ZT0-3 0.008842866833333332 0.0 0.017685733666666665 ZT4-7 0.0 0.0 0.0 ZT8-11 0.0101805275 0.0 0.020361055 ZT12-15 0.0 0.0 0.0 ZT16-19 0.020175189000000003 0.020149424000000003 0.020200954 ZT20-23 0.0106480725 0.0 0.021296145