condition mean min max ZT0-3 9282.3 9282.3 9282.3 ZT4-7 8062.4 8062.4 8062.4 ZT8-11 4616.7 4616.7 4616.7 ZT12-15 1244.6 1244.6 1244.6 ZT16-19 830.6500000000001 830.6500000000001 830.6500000000001 ZT20-23 3434.75 3434.75 3434.75