condition mean min max ZT0-3 11.6578 11.6578 11.6578 ZT4-7 9.00686 9.00686 9.00686 ZT8-11 10.15295 10.15295 10.15295 ZT12-15 10.243345000000001 10.243345000000001 10.243345000000001 ZT16-19 17.3657 17.3657 17.3657 ZT20-23 13.4069 13.4069 13.4069