Concept explainers
(a)
To give a
(a)
Answer to Problem 15E
We conclude that we are
Explanation of Solution
It is given in the question that the paralyzed Veterans of America is a philanthropic organization that relies on contribution. They send free mailing labels and greeting card to potential donors on their list and ask a voluntary contribution. Thus, we have,
Let us first check the conditions for the following as:
Random condition: It is satisfied as it is assumed that the sample is randomly selected.
Normal condition: It is satisfied as,
Thus, all the conditions are met. Therefore, now, to find the confidence interval we will use the calculator
Thus, the confidence interval will be as:
Thus, we conclude that we are
(b)
To explain do you find that percentage plausible.
(b)
Answer to Problem 15E
No, it is not plausible.
Explanation of Solution
It is given in the question that the paralyzed Veterans of America is a philanthropic organization that relies on contribution. They send free mailing labels and greeting card to potential donors on their list and ask a voluntary contribution. Thus, the confidence interval will be as:
Thus, we conclude that we are
Chapter 19 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
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