condition mean min max ZT0-3 362.262017 362.262017 362.262017 ZT4-7 805.216306 805.216306 805.216306 ZT8-11 903.7489305 903.7489305 903.7489305 ZT12-15 593.0847295 593.0847295 593.0847295 ZT16-19 469.53974949999997 469.53974949999997 469.53974949999997 ZT20-23 271.652353 271.652353 271.652353