condition mean min max ZT0-3 50.43363333333334 22.043300000000002 65.34140000000001 ZT4-7 26.5925 26.5925 26.5925 ZT8-11 37.4901 37.4901 37.4901 ZT12-15 39.698125000000005 38.69375 40.7025 ZT16-19 45.03415 45.03415 45.03415 ZT20-23 69.38725 69.38725 69.38725