condition mean min max ZT0-3 42.107125 32.93715 51.277100000000004 ZT4-7 17.018 17.018 17.018 ZT8-11 10.9424 10.9424 10.9424 ZT12-15 0 0 0 ZT16-19 10.84095 10.84095 10.84095 ZT20-23 13.613050000000001 13.613050000000001 13.613050000000001