condition mean min max ZT0-3 0.023583066666666666 0.01737885 0.0348194 ZT4-7 0.06938685 0.06938685 0.06938685 ZT8-11 0.0178796 0.0178796 0.0178796 ZT12-15 0.00872725 0.0 0.0174545 ZT16-19 0.0693405 0.0693405 0.0693405 ZT20-23 0.01885045 0.01885045 0.01885045