Stats 210 VCU Exam 1 2025(Questions and answers) LATEST UPDATE
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Course
Stats 210 VCU
Institution
Stats 210 VCU
What is "stratified random sampling"? - ️️the population is naturally divided into two
or more groups of similar subjects, called STRATA. from there, a simple random sample
is then chosen from each group, and these simple random samples are combined to
then give the complete sample.
What is...
Stats 210 VCU Exam 1
What is "stratified random sampling"? - ✔️✔️the population is naturally divided into two
or more groups of similar subjects, called STRATA. from there, a simple random sample
is then chosen from each group, and these simple random samples are combined to
then give the complete sample.
What is "discrete quantitative variable"? - ✔️✔️a variable whose measurements can
assume only a COUNTABLE number of possible values
Population - ✔️✔️the entire group of individuals or subjects about which the research
wants information
During July and August of 2014 Bob and Maureen McDonnell have been on trial
defending themselves of federal corruption charges. Of interest is to determine the
proportion of all current eligible voters in the Commonwealth of Virginia who feel Bob
and Maureen McDonnell are guilty of the charges made against them. Based on this
information, what is the population of interest? - ✔️✔️The population of interest is all
current eligible voters in the Commonwealth of Virginia.
Parameter - ✔️✔️a specific characteristic of the population that the researcher wants to
determine and make statements about... what exactly they're looking for within the
population
The prosecution has a list of 61 witnesses that it plans to call in the corruption trial of
Bob and Maureen McDonnell. Of interest is to determine the mean amount of time that
each witness spent on the witness stand. In this scenario, what is the population of
interest? - ✔️✔️The population of interest is the 61 witnesses that the prosecution
plans to call in the corruption trial of Bob and Maureen McDonnell.
A study of the witness list reveals that 6 of the 61 prosecution witnesses are immediate
family of former Governor Bob McDonnell. In this scenario, is 6 an example of a
parameter or a statistic? - ✔️✔️Parameter- 6 out of the population of 61 prosecution
witnesses are immediate family of former Governor Bob McDonnell.
What is "hypothesis"? - ✔️✔️a statement about a population parameter
What is "constant"? - ✔️✔️a characteristic whose measurements are the same for
every observation in the population or sample- the measurements do not change in
repeated trials over time
What is "variable"? - ✔️✔️a characteristic whose measurements vary (or change) from
trial to trial or individual to individual.
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