Essay

According to the planned analysis example, what are the specific statistical calculations, visual graphs, and effect sizes a researcher should plan to use when they anticipate differences between groups compared to when they expect correlations?

Question: According to the planned analysis example, what are the specific statistical calculations, visual graphs, and effect sizes a researcher should plan to use when they anticipate differences between groups compared to when they expect correlations?

Sample answer: When researchers anticipate differences between groups, their planned analysis should include calculating means and standard deviations, creating bar graphs, and computing Cohen's dd. In contrast, when expecting correlations between variables, they should generate scatterplots or line graphs, check for nonlinearity and restriction of range, and calculate Pearson's rr.

Key points:

  • Mention calculating means and standard deviations for group differences.
  • Mention creating bar graphs for group differences.
  • Mention computing Cohen's dd for group differences.
  • Mention generating scatterplots or line graphs for expected correlations.
  • Mention checking for nonlinearity and restriction of range for expected correlations.
  • Mention calculating Pearson's rr for expected correlations.

Rubric: The answer must accurately recall the specific analyses for both group differences and correlations as described in the text.

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Updated 2026-05-27

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Research Methods in Psychology - 4th American Edition @ KPU

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