condition mean min max ZT0-3 351.155134 351.155134 351.155134 ZT4-7 230.1114895 230.1114895 230.1114895 ZT8-11 113.2613255 113.2613255 113.2613255 ZT12-15 287.3746565 287.3746565 287.3746565 ZT16-19 79.707583 79.707583 79.707583 ZT20-23 128.3231485 128.3231485 128.3231485