Question: In a study examining the permanence of academic learning, Bahrick and Hall (1991) tested knowledge of high school algebra for two groups of participants 50 years after they graduated from high school. One group had received additional college math courses and the other group had no advanced math courses in college. The following table shows data similar to Bahrick and Hall’s results. Do the data indicate a significant difference between the two groups? Use a two-tailed test with a = .05.

No College Math Additional Math

n = 4 n = 8

M = 42 N = 50

SS = 100 SS = 140