condition mean min max ZT0-3 4256.752711 4092.758147 4420.747275 ZT4-7 3193.8277095 2981.997775 3405.657644 ZT8-11 2991.2256239999997 2942.0257684999997 3040.4254794999997 ZT12-15 5487.11228675 4205.280405 6768.9441685 ZT16-19 6783.1864015 6532.367848 7034.004955 ZT20-23 6475.8266137499995 6414.3891244999995 6537.2641029999995