condition mean min max ZT0-3 0.833939 0.7636565 0.9042215 ZT4-7 0.300847 0.300847 0.300847 ZT8-11 0.759075 0.759075 0.759075 ZT12-15 0 0 0 ZT16-19 0.4512995 0.4512995 0.4512995 ZT20-23 0.450781 0.450781 0.450781