Exercise reduces depressive symptoms in adults with arthritis: Evidential value

Figure 3 Diagnostic plot for power estimation. This figure illustrates how close the expected P-curve is to the observed P-curve for each level of power between 5% and 99%. The Y-axis is the perfect fit distance for each level of power. The estimated power for exercise-induced changes in depressive symptoms data is 69%. The solid red circle is generally lower than the other markers, suggesting that the power estimate is a better fit than the alternatives. The flatter the curve, the less confidence in the power estimate. Alternatively, a V-shape suggests an ideal estimate of power.