Research Articles And Research Study – Statistics

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Research Articles And Research Study – Statistics
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Research Articles And Research Study – STATS

Research Articles, Standard Deviation, Sample, Population, Distribution, Research Study, Sample Standard Deviation, Research Participants, Population Standard Deviation – STATS


A set of scores ranges from a high of X = 63 to a low of X = 28. If these scores were put in a grouped frequency distribution table, what would be the best choice for the interval width?

5 points


A biologist records the number and types of fish caught in a local lake during a 2- year period. The biologist reports that 7% of the fish caught during this period were trout, whereas 43% of the fish caught were bass. These reports of the number of trout and bass at this lake are examples of _____.

Relative frequencies


After reading a discussion section of a research article, asking if there are alternative explanations for the results is a good way to come up with an idea for a future study.

True


Before searching in PsycINFO, it is wise to identify the correct subject terms for the topics you have identified.

True


Magazine articles that describe previous research are primary sources.

False


A problem with primary sources is that they may provide an incomplete or misinterpreted description of a research study or a research result.

False

Betsy is currently completing a school teaching placement in order to become an elementary school teacher. One component of the placement includes evaluations from teachers at the school. Evaluations of student teachers are normally distributed with µ = 100 and σ = 12. Betsy is informed that she must score within the interquartile range of this distribution on her evaluations in order to be certified as an elementary school teacher. Which scores encompass the range that Betsy may score to successfully become certified as an elementary school teacher?

Find z score for both
z= -0.67 x = zσ + µ=91.91 (92); z= 0.67 x = zσ + µ= 108.09 (108)


A population of scores has µ = 44. In this population, a score of X = 40 corresponds to z = -1.00. What is the population standard deviation?

4


For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score that is 9 points above the mean?

z = +1.80


For a population with µ = 84 and σ = 4, what is the z-score corresponding to X = 80?

-1.00


For a sample, a score that is 12 points above the mean has a z-score of z = 1.20. What is the sample standard deviation?

s = 10


Which example violates the ethical guidelines concerning deception?

Administering shocks without giving participants advanced warning and obtaining consent


In research with nonhuman subjects, researchers ________.

Do not need to justify their research


Applied research is intended to answer theoretical questions.

False


The discussion section of a research article typically ____.

Provides interpretation of the findings


Last week Tim obtained a score of X = 54 on a math exam with µ = 60 and σ = 8. He also scored X = 49 on an English exam with µ = 55 and σ = 3, and he scored X = 31 on a psychology exam with µ = 37 and σ = 4. For which class should Tim expect the worst grade relative to his peers?

English


For a sample with M = 66, a score of X = 55.5 corresponds to z = -1.50. What is the sample standard deviation?

7


A set of scores ranges from a high of X = 63 to a low of X = 28. If these scores were put in a grouped frequency distribution table, what would be the best choice for the interval width?

5 points


A biologist records the number and types of fish caught in a local lake during a 2- year period. The biologist reports that 7% of the fish caught during this period were trout, whereas 43% of the fish caught were bass. These reports of the number of trout and bass at this lake are examples of _____.

Relative frequencies


After reading a discussion section of a research article, asking if there are alternative explanations for the results is a good way to come up with an idea for a future study.

True


Before searching in PsycINFO, it is wise to identify the correct subject terms for the topics you have identified.

True


Magazine articles that describe previous research are primary sources.

False


A problem with primary sources is that they may provide an incomplete or misinterpreted description of a research study or a research result.

False


A researcher who deliberately omits informing participants about the true intent of a questionnaire is committing ____.

Passive deception


One responsibility of the IACUC is to ensure that ____.

Discomfort is minimized in nonhuman subjects in research


The Milgram study involved ____.

Asking participants to administer what appeared to be severe shocks to other people


The Belmont Report provides basic ethical guidelines for the ____.

Treatment of human participants in research


A good way to come up with a research idea is to look in the discussion section of a research article, and find the discussion of ideas for future research.

True


Which statement is the best example of a hypothesis?

Smaller class sizes is related to better academic performance


A population has µ = 50. Which value of σ would make X = 55 a central, representative score in the population distribution?

= 6 (highest score)


A set of scores ranges from a low of X = 25 to a high of X = 33 and has a mean of 29. Which of the following is the most likely value for the standard deviation for these scores

2 points


If individuals are pressured into participating in research because the researcher is in a position of power or authority, then which ethical principle is being compromised?

Informed consent


Who is acting as a confederate?

Jay, who pretends to be a research participant even though he is actually working with the experimenter


What’s the most common type of query used to search the PsycINFO database?

Subject word


You read an article that summarizes findings from several different empirical reports. Which type of source is this an example of?

Secondary


A sample of n = 6 scores has SS = 40. If these same scores were a population, then the SS for the population would be _____.

40


A population of N = 5 scores has a mean of µ = 20 and a standard deviation of σ = 4. Which of the following is the correct interpretation of the standard deviation?

The average distance of scores from the mean of µ = 20 is 4 points.


A literature search is successfully ended when you stop uncovering new leads.

True


The discussion section of an APA-style research report often contains a description of the limitations of the research

True


Which response option below is consistent with the standard deviation for the population of N = 10 scores depicted below?

a. 2.67

b. 3.16

c. 3.00

d. 2.53


A set of scores ranges from a high of X = 63 to a low of X = 28. If these scores were put in a grouped frequency distribution table, what would be the best choice for the interval width?

5 points


A biologist records the number and types of fish caught in a local lake during a 2- year period. The biologist reports that 7% of the fish caught during this period were trout, whereas 43% of the fish caught were bass. These reports of the number of trout and bass at this lake are examples of _____.

Relative frequencies


After reading a discussion section of a research article, asking if there are alternative explanations for the results is a good way to come up with an idea for a future study.

True


Before searching in PsycINFO, it is wise to identify the correct subject terms for the topics you have identified.

True


Magazine articles that describe previous research are primary sources.

False


A problem with primary sources is that they may provide an incomplete or misinterpreted description of a research study or a research result.

False


Betsy is currently completing a school teaching placement in order to become an elementary school teacher. One component of the placement includes evaluations from teachers at the school. Evaluations of student teachers are normally distributed with µ = 100 and σ = 12. Betsy is informed that she must score within the interquartile range of this distribution on her evaluations in order to be certified as an elementary school teacher. Which scores encompass the range that Betsy may score to successfully become certified as an elementary school teacher?

Find z score for both
z= -0.67 x = zσ + µ=91.91 (92); z= 0.67 x = zσ + µ= 108.09 (108)


A population of scores has µ = 44. In this population, a score of X = 40 corresponds to z = -1.00. What is the population standard deviation?

4


For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score that is 9 points above the mean?

z = +1.80


For a population with µ = 84 and σ = 4, what is the z-score corresponding to X = 80?

-1.00


For a sample, a score that is 12 points above the mean has a z-score of z = 1.20. What is the sample standard deviation?

s = 10


Last week Tim obtained a score of X = 54 on a math exam with µ = 60 and σ = 8. He also scored X = 49 on an English exam with µ = 55 and σ = 3, and he scored X = 31 on a psychology exam with µ = 37 and σ = 4. For which class should Tim expect the worst grade relative to his peers?

English


A population of N = 5 scores has a mean of µ = 20 and a standard deviation of σ = 4. Which of the following is the correct interpretation of the standard deviation?

The average distance of scores from the mean of µ = 20 is 4 points.


The discussion section of an APA-style research report often contains a description of the limitations of the research

True


For a sample with M = 66, a score of X = 55.5 corresponds to z = -1.50. What is the sample standard deviation?

7

Last week Tim obtained a score of X = 54 on a math exam with µ = 60 and σ = 8. He also scored X = 49 on an English exam with µ = 55 and σ = 3, and he scored X = 31 on a psychology exam with µ = 37 and σ = 4. For which class should Tim expect the worst grade relative to his peers?

English


A population of N = 5 scores has a mean of µ = 20 and a standard deviation of σ = 4. Which of the following is the correct interpretation of the standard deviation?

The average distance of scores from the mean of µ = 20 is 4 points.


For a population with µ = 84 and σ = 4, what is the z-score corresponding to X = 80?

-1.00


For a population with a standard deviation of σ = 5, what is the z-score corresponding to a score that is 9 points above the mean?

z = +1.80


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