condition mean min max ZT0-3 5.31823 5.31823 5.31823 ZT4-7 2.31414 2.31414 2.31414 ZT8-11 2.67987 2.67987 2.67987 ZT12-15 2.6199950000000003 2.6199950000000003 2.6199950000000003 ZT16-19 5.713403333333333 5.713403333333333 5.713403333333333 ZT20-23 4.8297099999999995 4.8297099999999995 4.8297099999999995