condition mean min max ZT0-3 186.2055 162.8175 226.2465 ZT4-7 189.2665 189.2665 189.2665 ZT8-11 190.627 190.627 190.627 ZT12-15 178.55675000000002 156.489 200.6245 ZT16-19 159.28050000000002 159.28050000000002 159.28050000000002 ZT20-23 156.6385 156.6385 156.6385