(Solved): 4. Dr. Yldiz examines the effectiveness of an intervention on older people's problem solving skil ...

4. Dr. Y?ldiz examines the effectiveness of an intervention on older people's problem solving skills. She assesses problem solving skills of a sample of \( \mathbf{n}=\mathbf{2 5} \) older people before and after the intervention. The results show an average increase in performance of \( M_{D}=7 \) with \( S S=915 \). Does this result support the conclusion that the intervention has a significant effect on cognitive performance? Use a two-tailed test with \( \alpha=.05 \). ( \( \angle \hat{c} \) nts)