condition mean min max ZT0-3 12.970374999999999 11.421 14.519749999999998 ZT4-7 10.4955 10.4955 10.4955 ZT8-11 11.363 11.363 11.363 ZT12-15 0 0 0 ZT16-19 14.815349999999999 14.815349999999999 14.815349999999999 ZT20-23 13.988900000000001 13.988900000000001 13.988900000000001