Suppose That 45% of Customers at the Local Farmer's Market

Short Answer

Suppose that 45% of customers at the local farmer's market prefer plastic bags to paper bags, whereas 62% of customers at the local grocery store prefer plastic bags to paper bags. You plan to take a simple random sample of 40 farmer's market customers and 40 grocery story customers and survey their bag preferences. Define p ̂_F-p ̂_G as the difference in sample proportions that prefer plastic bags to paper bags between the two locations (farmer's market - grocery store).
-Calculate μ_(p_F-p_G ).