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Table 2 Testing values for correlation improvement

From: Predicting epidemics using search engine data: a comparative study on measles in the largest countries of Europe

no E1 E2 Improvement (UK) Improvement (ES)
1 1 4 −0.30% −0.32%
2 2 3 −1.21% −1.05%
3 1 1 0% 0%
4 3 2 5.12% 6.04%
5 4 1 1.20% 1.33%