condition mean min max ZT0-3 430.91623 430.91623 430.91623 ZT4-7 292.8583265 292.8583265 292.8583265 ZT8-11 110.48229649999999 110.48229649999999 110.48229649999999 ZT12-15 284.129775 284.129775 284.129775 ZT16-19 80.2628245 80.2628245 80.2628245 ZT20-23 53.853618499999996 53.853618499999996 53.853618499999996