condition mean min max ZT0-3 1.3013645 0.477874 2.124855 ZT4-7 11.800780000000001 11.800780000000001 11.800780000000001 ZT8-11 21.57705 21.57705 21.57705 ZT12-15 0 0 0 ZT16-19 0.939682 0.939682 0.939682 ZT20-23 1.1815115 1.1815115 1.1815115