condition mean min max ZT0-3 9.298520002750001 9.107146589500001 9.489893416000001 ZT4-7 11.29831375 10.9203565 11.676271 ZT8-11 14.2506658575 13.51077535 14.990556365 ZT12-15 23.790891205 19.126262965000002 28.455519445 ZT16-19 32.4894464125 28.620240735 36.35865209 ZT20-23 56.564271357500004 48.249418415 64.8791243