A survey estimates the proportion of adults who read at least one book per month. Sample A uses 200 randomly selected adults and Sample B uses 800 randomly selected adults, both from the same population. The sample proportion in both is 0.35. How does the width of the 95% confidence interval from Sample B compare to that from Sample A?
-
A
The interval from Sample B is half as wide as that from Sample A.
-
B
The interval from Sample B is twice as wide as that from Sample A.
-
C
The intervals are the same width.
-
D
The interval from Sample B is one-fourth as wide as that from Sample A.