condition mean min max ZT0-3 47.607452 47.607452 47.607452 ZT4-7 48.516689 48.516689 48.516689 ZT8-11 58.545707500000006 58.545707500000006 58.545707500000006 ZT12-15 61.4772295 61.4772295 61.4772295 ZT16-19 69.150494 69.150494 69.150494 ZT20-23 59.8748545 59.8748545 59.8748545