condition mean min max ZT0-3 51.346523757499995 41.675141714999995 61.017905799999994 ZT4-7 11.614655646 10.1025546755 13.1267566165 ZT8-11 7.77710667625 6.4200335775 9.134179775 ZT12-15 8.500255648 8.4791972395 8.5213140565 ZT16-19 11.616998031249999 8.6352385225 14.59875754 ZT20-23 24.1078763775 22.635732255 25.5800205