condition mean min max ZT0-3 3.3796883333333336 1.560485 6.242005000000001 ZT4-7 0.76346 0.76346 0.76346 ZT8-11 0.0 0.0 0.0 ZT12-15 0.7822475 0.0 1.564495 ZT16-19 3.079275 3.079275 3.079275 ZT20-23 1.75207 1.75207 1.75207