condition mean min max ZT0-3 2026.910073 2026.910073 2026.910073 ZT4-7 2487.952166 2487.952166 2487.952166 ZT8-11 1974.7004745 1974.7004745 1974.7004745 ZT12-15 2243.820557 2243.820557 2243.820557 ZT16-19 1883.730181 1883.730181 1883.730181 ZT20-23 1581.0029215 1581.0029215 1581.0029215