12. An independent-measures study uses n = 15 participants in each group to compare two treatment conditions. What is the df value for the t-statistic for this study? а. 14 b. 15 с. 28 d 29

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12. An independent-measures study uses n = 15 participants in each group to compare two treatment
conditions. What is the df value for the t-statistic for this study?
а. 14
b. 15
с. 28
d. 29
Transcribed Image Text:12. An independent-measures study uses n = 15 participants in each group to compare two treatment conditions. What is the df value for the t-statistic for this study? а. 14 b. 15 с. 28 d. 29
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