Question

You are interested in constructing a 95% confidence interval for the proportion of all pregnant women who regularly drink caffeinated beverages. Of the 1000 randomly selected pregnant women, 271 regularly drank caffeinated beverages. A. With 95% confidence the proportion of all pregnant women who regularly drink caffeinated beverages is between and

A. With 95% confidence the proportion of all Americans who believe that evolution of species is false is between                           [ Select ]                       ["0.608", "0.531", "0.547", "0.613"]         and                           [ Select ]                       ["0.587", "0.548", "0.723", "0.293"]         .

B. If many groups of 1200 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About                            [ Select ]                       ["5", "10", "90", "95"]         percent of these confidence intervals will contain the true population proportion of Americans that believe evolution of species is false and about                            [ Select ]                       ["10", "95", "90", "5"]         percent will not contain the true population proportion.

Answer 1

The 95% confidence interval for the proportion of all pregnant women who regularly drink caffeinated beverages is

(A) Need n and p.

(B) If many groups of 1200 randomly selected Americans were surveyed, then a different confidence interval would be produced from each group. About 95 percent of these confidence intervals will contain the true population proportion of Americans that believe evolution of species is false and about 5 percent will not contain the true population proportion.