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Correlation matrix.
| R&D | GDP_pc | Reading score | Math score | Science score | Average_score | |
|---|---|---|---|---|---|---|
| R&D | 1 | |||||
| GDP_pc | 0.5955 | 1 | ||||
| Reading score | 0.6267 | 0.5184 | 1 | |||
| Math score | 0.6434 | 0.5114 | 0.9388 | 1 | ||
| Science score | 0.6094 | 0.4825 | 0.9728 | 0.9624 | 1 | |
| Average_score | 0.6357 | 0.5114 | 0.984 | 0.9814 | 0.9923 | 1 |
