condition mean min max ZT0-3 16652.2328 16652.2328 16652.2328 ZT4-7 19488.565580000002 19488.565580000002 19488.565580000002 ZT8-11 17905.04427 17905.04427 17905.04427 ZT12-15 16672.989705 16672.989705 16672.989705 ZT16-19 12630.059185 12630.059185 12630.059185 ZT20-23 12494.84213 12494.84213 12494.84213