condition mean min max ZT0-3 12.7386 12.7386 12.7386 ZT4-7 10.538350000000001 10.538350000000001 10.538350000000001 ZT8-11 9.54488 9.54488 9.54488 ZT12-15 11.26295 11.26295 11.26295 ZT16-19 12.0716 12.0716 12.0716 ZT20-23 12.4335 12.4335 12.4335