Concept explainers
To use your interval from exercise
Answer to Problem 47E
We are then
Explanation of Solution
It is given that,
Conditions to be met are:
The three conditions for calculating a confidence interval for the population proportion p are:
Random: It is satisfied because the samples are randomly selected.
Independent: It is satisfied because the sample of
Normal: It is satisfied because there are
Thus, all the three conditions are satisfied.
The calculation is as:
The sample proportion is the number of successes divided by the sample size as:
For the confidence interval
Thus, the margin of error is then:
Thus, the confidence interval is as:
So, we are
However, we know that the population contains
Thus, we are then
Chapter 8 Solutions
PRACTICE OF STATISTICS F/AP EXAM
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