1.Another researcher conducted a different study that examined the relationship between observed hypnotisability (as rated by the researcher), and the self-reported scepticism towards hypnotism as measured via a questionnaire.Scores on hypnotisability ranged from 1 to 10 with higher scores indicating higher hypnotisability.Scores on scepticism ranged from 1 to 20 with higher scores indicating greater scepticism towards hypnosis.This researcher collected data from 20 participants and calculated the following correlation and regression statistics.

r = - 0.30, r² = 0.09

If r = -0.60 rather than -0.30, by how much would the percentage of variance in hypnotisability scores explained by scepticism increase?