condition mean min max ZT0-3 10.59052 10.59052 10.59052 ZT4-7 13.8630035 13.8630035 13.8630035 ZT8-11 11.339352 11.339352 11.339352 ZT12-15 12.717987 12.717987 12.717987 ZT16-19 12.800177999999999 12.800177999999999 12.800177999999999 ZT20-23 12.4276415 12.4276415 12.4276415