A national survey reported that 52% of adults prefer Brand A coffee, with a margin of error of 3 percentage points. A separate regional survey reported that 48% of adults in a specific state prefer Brand A coffee, with a margin of error of 4 percentage points. Based on these results, which of the following is the most appropriate conclusion?
It is certain that a higher percentage of adults nationally prefer Brand A coffee than in the specific state.
The national survey's confidence interval for Brand A preference is (49%, 55%).
It is plausible that the percentage of adults who prefer Brand A coffee is higher nationally than in the specific state, but not statistically conclusive.
The true percentage of adults nationally who prefer Brand A coffee is exactly 52%.
