condition mean min max ZT0-3 7.9960016666666665 7.052664999999999 9.589739999999999 ZT4-7 5.236705000000001 5.236705000000001 5.236705000000001 ZT8-11 6.347530000000001 6.347530000000001 6.347530000000001 ZT12-15 10.896325000000001 10.7164 11.076250000000002 ZT16-19 8.257539999999999 8.257539999999999 8.257539999999999 ZT20-23 9.40999 9.40999 9.40999