Groceries In January 2011, Yahoo surveyed 2400 U. S. men. 1224 of the men identified themselves as the primary grocery shopper in their household.. b) A grocery store owner believed that only 45% of men are the primary grocery shopper for their family, and targets his advertising accordingly. He wishes to con-duct a hypothesis test to see if the fraction is in fact higher than 45%. What does your confidence interval indicate?