(a)
To identify the population and the sample.
(a)
Answer to Problem T4.13SPT
Population: all US students in grades
Samples: The
Explanation of Solution
The population is the area we want to study about and the sample is a small subgroup of the population that represent the population as a whole.
Thus, population: all US students in grades
And samples: The
(b)
To explain why it is better to randomly select the students rather than putting the survey question on website and inviting students to answer the question.
(b)
Explanation of Solution
It is better to randomly selecting the students rather than putting the survey question on website and inviting students to answer the question because random selection reduces the effects of bias due to self-selection and also allows the results to be inferred to a larger population. In this case, students who respond to an online survey might be more interested in computer science, leading to an estimate that is too high.
(c)
To explain do you expect that the percentage of all U.S. students in grade
(c)
Answer to Problem T4.13SPT
No.
Explanation of Solution
We do not expect that the percentage of all U.S. students in grade
(d)
To explain which of the three estimates
(d)
Answer to Problem T4.13SPT
Explanation of Solution
The estimate of
Chapter 4 Solutions
EBK PRACTICE OF STAT.F/AP EXAM,UPDATED
Additional Math Textbook Solutions
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