In a survey of 4045 adults, 708 say they have seen a ghost. Construct a 99% conf
ID: 3222420 • Letter: I
Question
In a survey of
4045
adults,
708
say they have seen a ghost.
Construct a 99% confidence interval for the population proportion. Interpret the results.
A 99% confidence interval for the population proportion is
(nothing,nothing).
(Round to three decimal places as needed.)
Interpret your results. Choose the correct answer below.
A.
With 99% probability, the population proportion of adults who say they have not seen a ghost is between the endpoints of the given confidence interval.
B.
The endpoints of the given confidence interval show that 99% of adults have seen a ghost.
C.
With 99% confidence, it can be said that the sample proportion of adults who say they have seen a ghost is between the endpoints of the given confidence interval.
D.
With 99% confidence, it can be said that the population proportion of adults who say they have seen a ghost is between the endpoints of the given confidence interval.
Explanation / Answer
The statistical software output for 99% confidence interval is:
One sample proportion confidence interval:
p : Proportion of successes
Method: Standard-Wald
99% confidence interval results:
Hence.
A 99% confidence interval for population proportion is:
(0.160, 0.190)
Interpretation:
Option D is correct.
With 99% confidence, it can be said that the population proportion of adults who say they have seen a ghost is between the endpoints of the given confidence interval.
Proportion Count Total Sample Prop. Std. Err. L. Limit U. Limit p 708 4045 0.1750309 0.0059747116 0.15964107 0.19042074Related Questions
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