condition mean min max ZT0-3 0.2966565 0.2966565 0.2966565 ZT4-7 0.3529335 0.3529335 0.3529335 ZT8-11 0.4682415 0.4682415 0.4682415 ZT12-15 0.2002255 0.2002255 0.2002255 ZT16-19 0.6617664999999999 0.6617664999999999 0.6617664999999999 ZT20-23 0.3186925 0.3186925 0.3186925