Question 4 - Solution

The strongest linear relationship is between INTEL and ACHSCOR. All variables are positively correlated, i.e. subjects with higher intellectual ability and ``better'' study habits tend to have higher scores on the achievement test. However, the correlation is moderate, i.e. just a linear regression would not give a perfect prediction.

         ACHSCOR    INTEL
 INTEL     0.623
 STUDHAB   0.593    0.399