condition mean min max ZT0-3 43.590296 43.590296 43.590296 ZT4-7 48.212087499999996 48.212087499999996 48.212087499999996 ZT8-11 47.150153 47.150153 47.150153 ZT12-15 57.6494515 57.6494515 57.6494515 ZT16-19 27.172386000000003 27.172386000000003 27.172386000000003 ZT20-23 32.905498 32.905498 32.905498