condition mean min max ZT0-3 125.97551666666666 94.79204999999999 177.7285 ZT4-7 154.494 154.494 154.494 ZT8-11 141.25349999999997 141.25349999999997 141.25349999999997 ZT12-15 103.309625 98.49459999999999 108.12465 ZT16-19 74.80025 74.80025 74.80025 ZT20-23 59.66495 59.66495 59.66495