Concept explainers
(a)
To check: Percentage of Republicans among the respondents is 41%.
(a)
Answer to Problem 30PT3
The statement is false.
Explanation of Solution
Given information:
The two way table of responses by political persuasion is as follows
Candidate of choice | Political persuasion | |||
Democrat | Republican | Independent | Total | |
Obama | 925 | 78 | 26 | 1029 |
McCain | 78 | 598 | 19 | 695 |
Other | 2 | 8 | 11 | 21 |
Undecided | 32 | 28 | 45 | 105 |
Total | 1037 | 712 | 101 | 1850 |
Total number of respondents = 1850.
Formula used:
Calculation:
Number of republicans = 712
Percentage of republicans
(b)
To check: Marginal distribution of choice of candidates
(b)
Answer to Problem 30PT3
The statement is true.
Explanation of Solution
Formula used:
Marginal distribution
Obama
McCain
Other
Undecided
Calculation:
Number of Obama choice respondents
Marginal distribution of
Obama:
Number of McCain choice respondents
Marginal distribution of
McCain:
Number of Other choice respondents
Marginal distribution of
Other:
Number of Undecided choice respondents
Marginal distribution of
Undecided:
(c)
To check: Percentage of democrats planned to vote for McCain is
(c)
Answer to Problem 30PT3
The statement is false.
Explanation of Solution
Formula used:
Calculation:
Number of democrats
Number of democrats voted McCain
The required percentage is
(d)
To check: Percentage of those undecidedare Independents is
(d)
Answer to Problem 30PT3
Explanation of Solution
Formula used:
Calculation:
Number of undecided
Number of respondents undecided and Independent
The required percentage is
(e)
To check: The conditional distribution of political persuasion given McCain is the choice is Democrats:
(e)
Answer to Problem 30PT3
The statement is false.
Explanation of Solution
Formula used:
Democrat
Republican
Independent
Calculation:
Number of McCain respondents
Condition distribution of
Democrats
Number of democrats voted McCain
The required percentage is
Republican
Number of Republican voted McCain
The required percentage is
Independent
Number of Independent voted McCain
The required percentage is
Chapter 10 Solutions
The Practice of Statistics for AP - 4th Edition
Additional Math Textbook Solutions
Essentials of Statistics (6th Edition)
Elementary Statistics: Picturing the World (6th Edition)
Basic Business Statistics, Student Value Edition
Elementary Statistics (13th Edition)
Statistical Reasoning for Everyday Life (5th Edition)
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