Identify a research question from your professional life o…

Identify a research question from  your professional life or research interests that could be addressed by a  two-way factorial ANOVA. Indicate why factorial ANOVA would be an  appropriate analysis for this research question. Describe the predictor  variables and and levels (groups) and the outcome  variable and its associated measurement scale. Articulate the null  hypotheses for each main effect as well as the interaction. Discuss the  expected outcome of the factorial ANOVA.

Research Question:
Does the type of exercise (aerobic or strength training) and the duration of exercise session (30 minutes or 60 minutes) have an effect on the level of post-workout fatigue in individuals?

Why factorial ANOVA is appropriate:
Factorial ANOVA is an appropriate analysis for this research question because it allows for the simultaneous examination of two independent variables (exercise type and duration) and their interaction on the dependent variable (post-workout fatigue). This design allows for the investigation of main effects and potential interaction effects between variables, providing a comprehensive understanding of the factors that may influence post-workout fatigue.

Predictor variables and levels:
The first predictor variable is exercise type, categorized into two levels: aerobic exercise and strength training. The second predictor variable is exercise duration, categorized into two levels: 30 minutes and 60 minutes.

Outcome variable and measurement scale:
The outcome variable is post-workout fatigue, which can be assessed using a Likert scale ranging from 1 (no fatigue) to 10 (extreme fatigue). This scale allows for the quantification of subjective fatigue levels reported by the participants.

Null hypotheses:
For the main effect of exercise type:
H0: There is no significant difference in post-workout fatigue between individuals who perform aerobic exercise and individuals who perform strength training.

For the main effect of exercise duration:
H0: There is no significant difference in post-workout fatigue between individuals who engage in exercise sessions lasting 30 minutes and individuals who engage in exercise sessions lasting 60 minutes.

For the interaction effect between exercise type and duration:
H0: The effect of exercise duration on post-workout fatigue does not differ between aerobic exercise and strength training.

Expected outcome:
Based on previous research, it is expected that there will be significant main effects for both exercise type and exercise duration on post-workout fatigue. Aerobic exercise has been shown to lead to decreased fatigue levels compared to strength training, as it promotes cardiovascular fitness and endurance. Additionally, exercise duration has been linked to fatigue levels, with longer exercise sessions resulting in increased fatigue due to the higher energy expenditure.

Therefore, it is anticipated that participants engaged in aerobic exercise will report lower levels of fatigue compared to those engaged in strength training. Similarly, participants who engage in shorter exercise sessions (30 minutes) are likely to report lower levels of fatigue compared to those who engage in longer exercise sessions (60 minutes).

Furthermore, an interaction effect is also expected between exercise type and duration. It is hypothesized that the increase in fatigue levels associated with longer exercise sessions will be greater for strength training compared to aerobic exercise. This is because the intensity of strength training combined with prolonged duration may lead to higher levels of fatigue compared to the endurance-based nature of aerobic exercise.

In summary, the factorial ANOVA will allow for the examination of main effects and interaction effects between exercise type and duration on post-workout fatigue. The expected outcomes include significant main effects for exercise type and duration, indicating differences in fatigue levels between aerobic exercise and strength training, as well as between shorter and longer exercise sessions. Additionally, an interaction effect is expected, suggesting that the effect of exercise duration on fatigue will vary depending on the exercise type.