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If you find two significant main effects in a 2 x 3 factorial design, should you...

  1. If you find two significant main effects in a 2 x 3 factorial design, should you compute Tukey's post hoc comparisons for both?
  2. A 2 x 3 x 5 factorial design has how many possible main effects?
  3. How many conditions are in a 3 x 3 factorial design?
  4. What statistical test would I run to analyze the results of a 2 x 2 x 4 x 4 factorial design?
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