Statistical Issues Answers

Which statement about sample size is true?A.As the sample size within a study increases, statistical power decreases. B.As the sample size within a study decreases, statistical power decreases.C.As the sample size within a study decreases, statistical power increases. D.As the sample size within a study decreases, statistical power remains unaffected.

If a researcher wishes to study the relationship between self-esteem and level of intelligence, then gathering data about participants’ eye color would be __________. A.necessary because it may be an influencing variable in the studyB.unnecessary because it does not relate to the topic of the studyC.necessary because it may improve the validity of the studyD.unnecessary because eye color influences all variables being studied

Which of the following statements concerning statistical probability is not true?A.Probability involves the level of certainty a researcher has in a circumstance or event taking place.B.Probability influences how much a researcher is able to generalize research results back to the population.C.Probability influences whether or not a researcher can claim statistical significance.D.Probability levels for finding statistical significance increase as statistical power decreases.

Establishing a high critical value when calculating the results of a statistical test means that a researcher will have more confidence in finding significance than when a lower critical value is established.

Statistics can increase knowledge in all of the following ways except __________.A.addressing gaps of information that exist within variable relationshipsB.providing information used to improve psychological and medical practicesC.providing nonuseful information on ways to improve the educational systemD.providing more clarity about confusing variable relationships

All of the following are limitations of statistics except that it __________.A.provides limited informationB.cannot be influenced by inaccurate assumptionsC.promotes limitations in perceptionsD.can be misrepresented

A study must be valid to be considered reliable.

A test that is administered in a consistent manner increases the reliability of a study.

To produce a valid test, the survey questions do not have to relate to the subject of the study.

A test’s statistical significance depends on power and probability.