Concept explainers
(a)
To find the
(a)
Answer to Problem 43E
The mean is
Explanation of Solution
It is given in the question, the table for all the students who took AP statistics exam. Thus, the mean and the standard deviation of the scores is calculated from the values given in the table as:
(b)
To explain would you expect their scores to follow a Normal model if we select a random sample of
(b)
Answer to Problem 43E
No, we do not expect.
Explanation of Solution
It is given in the question, the table for all the students who took AP statistics exam. And the mean is
with about half as many
(c)
To describe the sampling model for these means.
(c)
Explanation of Solution
It is given in the question, the table for all the students who took AP statistics exam. And the mean is
Random condition: It is satisfied as the scores are selected randomly.
Independent condition: It is reasonable to think that the randomly selected scored are independent of one another.
Large enough sample condition: A sample of
Thus, all the conditions are met. Now, let us find the mean and the standard deviation as:
Now, since the conditions are satisfied the sampling distribution model for the mean of
Chapter 18 Solutions
Stats: Modeling the World Nasta Edition Grades 9-12
Additional Math Textbook Solutions
Elementary Statistics: Picturing the World (6th Edition)
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