condition mean min max ZT0-3 16.2315 16.2315 16.2315 ZT4-7 12.72065 12.72065 12.72065 ZT8-11 20.393749999999997 20.393749999999997 20.393749999999997 ZT12-15 25.13945 25.13945 25.13945 ZT16-19 19.71445 19.71445 19.71445 ZT20-23 18.75045 18.75045 18.75045