What's a good idea for a study that would need to be analyzed with a one-way ANOVA? What's a good a study idea where it would have at least 3 groups, where the members of each group would be measured on a variable that is on either an interval or ratio scale such that mean would be an appropriate measure of central tendency. What's a specific prediction about how you thinks the means would differ and a short rationale or theory for why you would make this prediction. What's at least two potential sources of within groups variance in the study. Remember that within groups variance comes from anything that might influence scores other than the factor that is used to create one's groups.

EXAMPLE POST: "An example of a study that could be analyzed with a one-way ANOVA would be an experiment designed to compare memory in people given no caffeine versus a small dose of caffeine versus a large dose of caffeine. I would predict that the small dose group would have a higher mean memory score than either of the other groups and that the low dose group and the high dose groups would have means that do not significantly differ. This prediction is based on the Yerkes-Dodson law which states that performance is highest at a medium level of arousal. Based on this law it is expected that people in the no caffeine condition would not have high memory scores due to having a low level of arousal and that people in the high caffeine condition would not have high memory scores due to having an arousal level that is so high that it impairs performance. It should be the people given a small dose of caffeine that experience the medium level of arousal known to maximize performance based on the Yerkes-Dodson law. One potential source of within group variance in this study could be how much sleep people got the night before the study and a second potential source of within group variance could be whether or not people were hungry while taking the memory test. (Lack of sleep and hunger could be potential sources of within groups variance in many studies, but in your own post I want to see some creativity so do not use lack of sleep or hunger for your own examples of within groups variance"