What is the purpose of the standard deviation when comparing two different mean values?

Acoastal community is drafting a plan in case of a hurricane. which action is an appropriate element for an effective plan? 1.) creating a map of areas that are not affected by storm surge 2.) plotting the location of all fire hydrants along major travel routes 3.) relocating any individuals who might be affected by the disaster 4.) identifying multiple evacuation routes for each area of the community

The process by which the diameter of the bone increases is called? a-metaphysic b-appositional growth c-diaphysics d-epiphysis

What are the two things that all sociologists do in their studies?