Question

#4 which of the following best defines the meaning of the term: \statistic\?
(a) an entire group of people, objects, or entities of interest to you.
(b) a part or portion of an entire group of people, objects, or entities.
(c) a numerical measurement (e.g. mean) calculated from a sample.
(d) a numerical measurement (e.g. mean) calculated from a population.
(e) none of the above.

#5 which of the following best defines the meaning of the term:
andom sample\?
(a) when a sample is drawn from a given population.
(b) when a population is drawn from a given sample.
(c) when a sample is representative of the population it was drawn from.
(d) when a sample is not representative of the population it was drawn from.
(e) none of the above correctly defines the meaning of this statistical term.

#6 which of the following best defines the meaning of \bias\ as used in statistics?
(a) when a sample is drawn from a given population.
(b) when a population is drawn from a given sample.
(c) when a sample is representative of the population it was drawn from.
(d) when a sample is not representative of the population it was drawn from.
(e) none of the above correctly defines the meaning of this statistical term.

#7 suppose you want to conduct a survey to determine how voters feel about our current u.s. tax policy. which of the following sources would be most likely to yield a truly unbiased sample? that is: margin of error (moe) equals 0.
(a) registered democratic voters
(b) registered republican voters
(c) independent voters
(d) unemployed voters

Explanation:

[#4] A statistic is a numerical value computed from sample data, distinguishing it from a parameter (population-based).
[#5] A random sample requires each element in the population to have an equal chance of selection, which none of A-D describe.
[#6] "Bins" refer to intervals for grouping data, not any option provided.
[#7] No single subgroup (A-D) can yield an unbiased sample of all voters; a random sample of all voters is needed, which isn’t listed.

Answer:

C. A numerical measurement (e.g. mean) calculated from a sample.
E. None of the above correctly defines the meaning of this statistical term.
E. None of the above correctly defines the meaning of this statistical term.
E. None of the above