RESEARCH METHODS AND STATISTICS QUESTIONS AND
ANSWERS 2025/2026 UPDATED ALL ANSWERS
ACCURATE GRADED A+ FOR SUCCESS
Which of the following is not a type of nonrandom sampling? - CORRECT ANSWERS
cluster sampling
When test scores represent an interval or ratio scale and the distribution of scores is skewed,
the best measure of central tendency for the distribution is usually which of the following? -
CORRECT ANSWERS median
The internal validity of a research study is threatened by statistical regression when: -
CORRECT ANSWERS participants were chosen for inclusion in the study because
they obtained extremely low scores on a pretest.
Community-based participatory research (CBPR) is best described as a type of: - CORRECT
ANSWERS action research
In the context of research, between-methods triangulation involves: - CORRECT
ANSWERS including both qualitative and quantitative methods to collect data.
Multicollinearity occurs when: - CORRECT ANSWERS scores on one or more
explanatory variables are highly correlated with scores on one or more of the other explanatory
variables
To measure the degree of association between high school diploma (yes or no) and yearly
income in dollars, you would use which of the following correlation coefficients? - CORRECT
ANSWERS point biserial
Changing alpha from .01 to .05 has which of the following effects? - CORRECT ANSWERS
It increases the probability of making a Type I error when the null hypothesis is true and
decreases the probability of making a Type II error when the null hypothesis is false.
ANSWERS 2025/2026 UPDATED ALL ANSWERS
ACCURATE GRADED A+ FOR SUCCESS
Which of the following is not a type of nonrandom sampling? - CORRECT ANSWERS
cluster sampling
When test scores represent an interval or ratio scale and the distribution of scores is skewed,
the best measure of central tendency for the distribution is usually which of the following? -
CORRECT ANSWERS median
The internal validity of a research study is threatened by statistical regression when: -
CORRECT ANSWERS participants were chosen for inclusion in the study because
they obtained extremely low scores on a pretest.
Community-based participatory research (CBPR) is best described as a type of: - CORRECT
ANSWERS action research
In the context of research, between-methods triangulation involves: - CORRECT
ANSWERS including both qualitative and quantitative methods to collect data.
Multicollinearity occurs when: - CORRECT ANSWERS scores on one or more
explanatory variables are highly correlated with scores on one or more of the other explanatory
variables
To measure the degree of association between high school diploma (yes or no) and yearly
income in dollars, you would use which of the following correlation coefficients? - CORRECT
ANSWERS point biserial
Changing alpha from .01 to .05 has which of the following effects? - CORRECT ANSWERS
It increases the probability of making a Type I error when the null hypothesis is true and
decreases the probability of making a Type II error when the null hypothesis is false.
