Chapter 8: Bivariate Correlational Research (Exam 2 Info)

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6 Terms

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bivariate correlation

associations that involve exactly 2 groups

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Associations between 2 quantitative variables (describing & graphing)

uses a scatterplot

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Cohen’s guide for evaluating correlation strength

If r equals…

  • .1 (or -.1) - small or weak correlation

  • .3 (or -.3) - medium or moderate correlation

  • .5 (or -.5) - large or strong correlations

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associations when 1 variable is categorical (describing & graphing)

  • uses a scatterplot or bar chart

  • uses a t-test

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t-test

a statistic to test the difference between 2 group averages

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What makes a study correlational?

having 2 measured variables