condition mean min max ZT0-3 5.13148 4.70191 5.56105 ZT4-7 4.713465 4.713465 4.713465 ZT8-11 6.393155 6.393155 6.393155 ZT12-15 0 0 0 ZT16-19 5.397405 5.397405 5.397405 ZT20-23 5.555540000000001 5.555540000000001 5.555540000000001