condition mean min max ZT0-3 3339.155134 3339.155134 3339.155134 ZT4-7 2910.5394335 2910.5394335 2910.5394335 ZT8-11 2524.0437460000003 2524.0437460000003 2524.0437460000003 ZT12-15 3315.462524 3315.462524 3315.462524 ZT16-19 3896.9109755 3896.9109755 3896.9109755 ZT20-23 3575.8247125 3575.8247125 3575.8247125