condition mean min max ZT0-3 892.54388 892.54388 892.54388 ZT4-7 915.6300255 915.6300255 915.6300255 ZT8-11 1253.078569 1253.078569 1253.078569 ZT12-15 1045.2715779999999 1045.2715779999999 1045.2715779999999 ZT16-19 540.733245 540.733245 540.733245 ZT20-23 257.23557700000003 257.23557700000003 257.23557700000003