5.52 Independent trials and Eurovision Song Contest bias: As reported in the Telegraph (Highfield, 2005), Oxford University researchers investigated allegations of voting bias in the annual Eurovision Song Contest, which pits pop music acts from across Europe, one per country, against each other. The research team found that neighboring countries tended to vote as a block— Norway with Sweden, Belarus with Russia, and Greece with Cyprus, for example. Explain why one could not consider the votes to be independent of each other in this case.