condition mean min max ZT0-3 0.41221549999999996 0.269287 0.555144 ZT4-7 0.9061589999999999 0.9061589999999999 0.9061589999999999 ZT8-11 2.965405 2.965405 2.965405 ZT12-15 0 0 0 ZT16-19 1.8915099999999998 1.8915099999999998 1.8915099999999998 ZT20-23 1.2355165000000001 1.2355165000000001 1.2355165000000001