condition mean min max ZT0-3 10.174985 9.541005 10.808965 ZT4-7 40.713750000000005 40.713750000000005 40.713750000000005 ZT8-11 30.104950000000002 30.104950000000002 30.104950000000002 ZT12-15 0 0 0 ZT16-19 8.42699 8.42699 8.42699 ZT20-23 16.12905 16.12905 16.12905