Quantitative Research Methods Final
Questions and Answers Graded A+
What is the significance of statistical power in quantitative research?
✔✔Statistical power refers to the probability of detecting a true effect if it exists, reducing the
likelihood of Type II errors.
What is the purpose of using a Likert scale in surveys?
✔✔To measure attitudes, opinions, or behaviors along a continuum from one extreme to another.
What is a null hypothesis in quantitative research?
✔✔A statement that there is no effect or relationship between the variables being studied.
What is the difference between cross-sectional and longitudinal studies?
✔✔Cross-sectional studies examine data at a single point in time, while longitudinal studies
track data over time.
What is the purpose of conducting a t-test in quantitative research?
✔✔To determine if there is a significant difference between the means of two groups.
1
,What is the role of a variable's operational definition in quantitative research?
✔✔It defines how the variable will be measured or quantified in the study.
How is a chi-square test used in quantitative research?
✔✔It is used to determine if there is a significant association between categorical variables.
What does the term "data validity" refer to in quantitative research?
✔✔The degree to which the data accurately measures what it is intended to measure.
How is a sample different from a population in quantitative research?
✔✔A sample is a subset of the population, selected to represent the population for the purpose of
the study.
Why is it important to control extraneous variables in quantitative research?
✔✔To ensure that the results of the study are due to the manipulation of the independent
variable, not other factors.
2
, What is the role of a literature review in quantitative research?
✔✔To identify gaps in existing knowledge and help form the basis for research questions and
hypotheses.
What does statistical significance mean in quantitative research?
✔✔It means the observed results are unlikely to have occurred by chance and are likely to reflect
a true effect.
What is the difference between a one-tailed and a two-tailed hypothesis test?
✔✔A one-tailed test predicts the direction of the effect, while a two-tailed test does not specify
the direction.
How does the central limit theorem relate to quantitative research?
✔✔It states that the distribution of sample means will approach a normal distribution as the
sample size increases, regardless of the population distribution.
What is the purpose of using a random number generator in quantitative research?
✔✔To select random samples or assignments, ensuring unbiased data collection.
3
Questions and Answers Graded A+
What is the significance of statistical power in quantitative research?
✔✔Statistical power refers to the probability of detecting a true effect if it exists, reducing the
likelihood of Type II errors.
What is the purpose of using a Likert scale in surveys?
✔✔To measure attitudes, opinions, or behaviors along a continuum from one extreme to another.
What is a null hypothesis in quantitative research?
✔✔A statement that there is no effect or relationship between the variables being studied.
What is the difference between cross-sectional and longitudinal studies?
✔✔Cross-sectional studies examine data at a single point in time, while longitudinal studies
track data over time.
What is the purpose of conducting a t-test in quantitative research?
✔✔To determine if there is a significant difference between the means of two groups.
1
,What is the role of a variable's operational definition in quantitative research?
✔✔It defines how the variable will be measured or quantified in the study.
How is a chi-square test used in quantitative research?
✔✔It is used to determine if there is a significant association between categorical variables.
What does the term "data validity" refer to in quantitative research?
✔✔The degree to which the data accurately measures what it is intended to measure.
How is a sample different from a population in quantitative research?
✔✔A sample is a subset of the population, selected to represent the population for the purpose of
the study.
Why is it important to control extraneous variables in quantitative research?
✔✔To ensure that the results of the study are due to the manipulation of the independent
variable, not other factors.
2
, What is the role of a literature review in quantitative research?
✔✔To identify gaps in existing knowledge and help form the basis for research questions and
hypotheses.
What does statistical significance mean in quantitative research?
✔✔It means the observed results are unlikely to have occurred by chance and are likely to reflect
a true effect.
What is the difference between a one-tailed and a two-tailed hypothesis test?
✔✔A one-tailed test predicts the direction of the effect, while a two-tailed test does not specify
the direction.
How does the central limit theorem relate to quantitative research?
✔✔It states that the distribution of sample means will approach a normal distribution as the
sample size increases, regardless of the population distribution.
What is the purpose of using a random number generator in quantitative research?
✔✔To select random samples or assignments, ensuring unbiased data collection.
3
