condition mean min max ZT0-3 1.44762975 1.2716045 1.6236549999999998 ZT4-7 1.2540550000000001 1.2540550000000001 1.2540550000000001 ZT8-11 1.158322 1.158322 1.158322 ZT12-15 0 0 0 ZT16-19 1.3765794999999998 1.3765794999999998 1.3765794999999998 ZT20-23 0.49987899999999996 0.49987899999999996 0.49987899999999996