condition mean min max ZT0-3 5.4544 5.4544 5.4544 ZT4-7 7.130955 7.130955 7.130955 ZT8-11 7.197884999999999 7.197884999999999 7.197884999999999 ZT12-15 13.0308 13.0308 13.0308 ZT16-19 5.831275 5.831275 5.831275 ZT20-23 6.2445900000000005 6.2445900000000005 6.2445900000000005