Reading speaker measurements can be a complicated task, as there are a lot of nuances you need to understand to properly interpret them.
Amir from Audio Science Review, well known for his Klippel NFS measurements (review of 1961 Center), has uploaded two very good tutorials, that explain the meaning of all those aspects.
Definitely worth watching!
Understanding Speaker Measurements
Example Speaker Measurements: Klipsch RP-600M/Neumann KH 150