condition mean min max ZT0-3 24291.7 24291.7 24291.7 ZT4-7 24254.9 24254.9 24254.9 ZT8-11 25177.1 25177.1 25177.1 ZT12-15 24654.6 24654.6 24654.6 ZT16-19 27612.0 27612.0 27612.0 ZT20-23 26032.65 26032.65 26032.65