19. correlations continued

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4 Terms

1
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what is a correlation coefficient

a number between -1 and +1 that represents the directions and strength of a relationship between co-variables

2
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strength of correlations

  • the closer to -1 or +1, the stronger the relationship between the co-variables

  • the closer to 0, the weaker the relationship


3
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signs and meaning

+0.5 is as strong as a relationship as -0.5 as the sign solely indicates the direction

4
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potential of weak correlations

coefficients that appear to indicate weak correlations can still be statistically significant as it depends on the size of the data set