condition mean min max ZT0-3 66.278712 66.278712 66.278712 ZT4-7 56.7252705 56.7252705 56.7252705 ZT8-11 65.11771949999999 65.11771949999999 65.11771949999999 ZT12-15 82.9268445 82.9268445 82.9268445 ZT16-19 101.62490249999999 101.62490249999999 101.62490249999999 ZT20-23 110.5399815 110.5399815 110.5399815