A chevron with seven stripes and a star in the middle indicates which rank?

The correct rank indicated by a chevron with seven stripes and a star in the middle is the Chief Master Sergeant. This insignia represents one of the highest ranks in the enlisted Air Force hierarchy. Specifically, the seven stripes signify the rank of Chief Master Sergeant, and the star indicates the additional responsibility and leadership role associated with this rank.

A Senior Master Sergeant has six stripes, while the Technical Sergeant and Master Sergeant ranks have fewer stripes, making them distinct from the Chief Master Sergeant. The presence of the star is a key feature that identifies it specifically as the Chief Master Sergeant rank rather than any of the other enlisted ranks.