condition mean min max ZT0-3 69.107473 69.107473 69.107473 ZT4-7 72.07818900000001 72.07818900000001 72.07818900000001 ZT8-11 60.261408 60.261408 60.261408 ZT12-15 76.443228 76.443228 76.443228 ZT16-19 73.869249 73.869249 73.869249 ZT20-23 98.443951 98.443951 98.443951