Concept explainers
a)
To construct: The 99% confidence interval for the proportion of visitors who are favor of restrictions and interpret it.
a)
Answer to Problem T8.11SPT
The confidence interval is (0.485, 0.696)
Explanation of Solution
Given:
Number of trials ( n ) = 150
Number of
Formula used:
The formula to compute the confidence interval for population proportion is:
Calculation:
The obtained Minitab output is:
Interpretation:
There is 99% probability that the proportion of visitors who are favor of restrictions lies between 0.485 and 0.696.
b)
To explain: Whether using the above part, it could be concluded that more than half of visitors are favor of restriction.
b)
Answer to Problem T8.11SPT
Yes.
Explanation of Solution
The confidence interval computed in above part lies between 0.485 and 0.696. Since, it contains the value (0.50) and upper limit of the confidence interval is higher than 0.50. Thus, it could be concluded that more than half of visitors are favor of restriction.
Chapter 8 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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