condition mean min max ZT0-3 27.61336 27.61336 27.61336 ZT4-7 70.812171 70.812171 70.812171 ZT8-11 157.08871 157.08871 157.08871 ZT12-15 150.78738099999998 150.78738099999998 150.78738099999998 ZT16-19 181.53144200000003 181.53144200000003 181.53144200000003 ZT20-23 134.736159 134.736159 134.736159