condition mean min max ZT0-3 30.088800000000003 25.842950000000002 34.33465 ZT4-7 24.4673 24.4673 24.4673 ZT8-11 22.488 22.488 22.488 ZT12-15 0 0 0 ZT16-19 35.65905 35.65905 35.65905 ZT20-23 36.3993 36.3993 36.3993