condition mean min max ZT0-3 3007.704262 3007.704262 3007.704262 ZT4-7 1719.3820265 1719.3820265 1719.3820265 ZT8-11 1488.5670515000002 1488.5670515000002 1488.5670515000002 ZT12-15 2247.661172 2247.661172 2247.661172 ZT16-19 3403.695613 3403.695613 3403.695613 ZT20-23 4597.2409295 4597.2409295 4597.2409295