condition mean min max ZT0-3 245.35333333333332 245.35333333333332 245.35333333333332 ZT4-7 206.55700000000002 206.55700000000002 206.55700000000002 ZT8-11 174.5745 174.5745 174.5745 ZT12-15 176.30349999999999 176.30349999999999 176.30349999999999 ZT16-19 230.912 230.912 230.912 ZT20-23 247.284 247.284 247.284