condition mean min max ZT0-3 57.835243 57.835243 57.835243 ZT4-7 75.563255 75.563255 75.563255 ZT8-11 75.60448500000001 75.60448500000001 75.60448500000001 ZT12-15 79.8655275 79.8655275 79.8655275 ZT16-19 86.516031 86.516031 86.516031 ZT20-23 75.028276 75.028276 75.028276