Concept explainers
(a)
Whether the sampling variability of the sample proportion changes from state to state if an SRS of 2020 tax returns is selected in each state or not.
(a)
Answer to Problem 17E
The sampling variability of the sample proportion changes from state to state.
Explanation of Solution
Here, the sampling variability will differ from state to state as some states will have variability in tax returns as other states more extremely low and more extremely high tax returns.
Hence, the sampling variability of the sample proportion changes from state to state.
(b)
Whether the sampling variability of the sample proportion changes from state to state if an SRS of 1% of all tax returns is selected in each state.
(b)
Answer to Problem 17E
The sampling variability of the sample proportion changes from state to state if an SRS of 2020 tax returns is selected in each state.
Explanation of Solution
Consider a simple random sample of 2000 tax returns from each state.
The population of California is larger than the population of Wyoming.
If the SRS of 2000 students is a larger part of the population, then there will be less sampling variability for the state and thus Wyoming will have less sampling variability than California.
Hence, the sampling variability of the sample proportion changes from state to state if an SRS of 2020 tax returns is selected in each state.
Chapter 7 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Introductory Statistics
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