A Gallup Poll asked a random sample of American adults the
question "Do you favor the death penalty for a person convicted of
murder?" Of these, 65% responded "Yes" and a 95% confidence
interval resulted in the upper and lower confidence limits of 60.8%
and 69.2%, respectively. The correct interpretation of the
confidence interval is as follows:
A. We are 95% confident that the percentage of all American
adults who favor the death penalty for a person convicted of murder
is between 60.8% and 69.2%.
B. We are 95% confident that the sample percentage is between
60.8% and 69.2%.
C. We are 95% confident that between 60.8% and 69.2% of all
adults in the world favor the death penalty for a person convicted
of murder.
D. In 95% of samples of American adults the percentage who favor
the death penalty for those convicted of murder will be between
60.8% and 69.2%.