condition mean min max ZT0-3 3541.664029 3541.664029 3541.664029 ZT4-7 4095.1620325 4095.1620325 4095.1620325 ZT8-11 4047.821578 4047.821578 4047.821578 ZT12-15 3990.604722 3990.604722 3990.604722 ZT16-19 3813.0310010000003 3813.0310010000003 3813.0310010000003 ZT20-23 4271.5851045 4271.5851045 4271.5851045