condition mean min max ZT0-3 6.35975 5.5536 7.1659 ZT4-7 9.40257 9.40257 9.40257 ZT8-11 8.12142 8.12142 8.12142 ZT12-15 0 0 0 ZT16-19 11.778905 11.778905 11.778905 ZT20-23 11.412949999999999 11.412949999999999 11.412949999999999