condition mean min max ZT0-3 52.012776 52.012776 52.012776 ZT4-7 71.94525 71.94525 71.94525 ZT8-11 77.67491749999999 77.67491749999999 77.67491749999999 ZT12-15 98.4628605 98.4628605 98.4628605 ZT16-19 84.40638899999999 84.40638899999999 84.40638899999999 ZT20-23 90.3604085 90.3604085 90.3604085