condition mean min max ZT0-3 22.743854 22.743854 22.743854 ZT4-7 29.641208 29.641208 29.641208 ZT8-11 26.444899 26.444899 26.444899 ZT12-15 22.8327155 22.8327155 22.8327155 ZT16-19 37.412978 37.412978 37.412978 ZT20-23 30.3801475 30.3801475 30.3801475