Only Admin can Edit, Delete or Update

Summary of Roles:

Super Admin – Someone with access to the blog network administration features controlling the entire network (See Create a Network).

Administrator – Somebody who has access to all the administration features

Editor – Somebody who can publish and manage posts and pages as well as manage other users’ posts, etc.

Author – Somebody who can publish and manage their own posts

Contributor – Somebody who can write and manage their posts but not publish them

Subscriber – Somebody who can only manage their profile

Sourse -> http://codex.wordpress.org/Roles_and_Capabilities