condition mean min max ZT0-3 88.90339167249999 80.297944825 97.50883852 ZT4-7 48.3347224825 44.51721284 52.152232125000005 ZT8-11 38.3462397575 35.90555209 40.786927425 ZT12-15 38.89089809 36.526268355 41.255527825 ZT16-19 55.7865879525 54.535538185 57.03763772 ZT20-23 66.8687013275 58.9712934 74.766109255