condition mean min max ZT0-3 8.318528 8.318528 8.318528 ZT4-7 9.466355 9.466355 9.466355 ZT8-11 10.888437 10.888437 10.888437 ZT12-15 14.265457000000001 14.265457000000001 14.265457000000001 ZT16-19 12.4024265 12.4024265 12.4024265 ZT20-23 10.894428 10.894428 10.894428