condition mean min max ZT0-3 76.3504625325 74.46252911 78.238395955 ZT4-7 62.0193242825 53.213034995 70.82561357 ZT8-11 40.537508682500004 32.834148835 48.24086853 ZT12-15 13.11630551175 11.0373752095 15.195235814 ZT16-19 25.10488927 19.63076917 30.579009369999998 ZT20-23 53.3030316925 42.779431419999995 63.826631965