Question: please, i need help with this statistic problem. About how many participants are needed for 80% power in each of the following planned studies that

please, i need help with this statistic problem.

  • About how many participants are needed for 80% power in each of the following planned studies that will use a t test for dependent mean with p<.05?
  • Study (a); Predicted Effect Size: Small; Tails: Two
  • Study (b); Predicted Effect Size: Medium; Tails: One
  • Study (c); Predicted Effect Size: Large: Tails: Two

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