condition mean min max ZT0-3 13.96435 13.96435 13.96435 ZT4-7 10.465340000000001 10.465340000000001 10.465340000000001 ZT8-11 9.43457 9.43457 9.43457 ZT12-15 11.51415 11.51415 11.51415 ZT16-19 11.858450000000001 11.858450000000001 11.858450000000001 ZT20-23 12.69615 12.69615 12.69615