Solution: When analyzing correlated observations, sources of correlation must be accounted for either by changing the unit of observation (e.g., from games to coaches) and/or by using a statistical model that can handle correlated observationsProblem 9: The abstract highlights within-group results but omits between-groups results, obscuring the fact that the groups do not differ significantly.Hypothetical example: Researchers conducted a randomized placebo-controlled trial of fish oil for improving cognitive function in stroke patients.