Blog

A researcher developed the following regression equation to predict muscular strength (y) from fat mass (Fat) in undergraduate students.                                                                             predicted y = 1.0 + 0.7 (Fat)                                                                                           R2 = .49                                                                                    In this sample, what is the proportion of the variance in undergraduate students’  muscular strength that is explained by fat mass (Fat)?

When a researcher is evaluating the external validity of a research design, what is the researcher primarily focusing on?

If a researcher was planning a randomized controlled trial to evaluate the effect of an exercise intervention (intervention group vs. control group) on blood pressure, in which situation would you need a larger sample size to achieve the same level of power.  Assume all other factors are kept the same.

A researcher compared the average physical activity scores for males and females using an effect size (Cohen’s d) and found an effect size of -2.5.  What is your interpretation?

If you were conducting a pairwise comparisons of 2 means and the 95% confidence interval for the difference in the 2 means was from -14 to -2, what would you conclude?

Impact of weight loss on health-related quality of life in older females. What is the dependent variable?

If the chi-square = 0, what decision would you make?

Which of the following traits in the Five-Factor Model of personality is associated with curiosity and an appreciation for a variety of experiences?

According to Erikson, the stage in life in which we make a retrospective accounting of our life to date and evaluate how much one embraces life as having been well lived, as opposed to regretting missed opportunities, is the stage of:

Children with ADHD may show behavior that is: