condition mean min max ZT0-3 53.463431 53.463431 53.463431 ZT4-7 66.119141 66.119141 66.119141 ZT8-11 67.18334949999999 67.18334949999999 67.18334949999999 ZT12-15 59.1789225 59.1789225 59.1789225 ZT16-19 38.4807705 38.4807705 38.4807705 ZT20-23 32.8282175 32.8282175 32.8282175