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For a study with a related samples design and 30 participants in which each participant is...

For a study with a related samples design and 30 participants in which each participant is measured twice (repeated measures), what is the critical value? Assume a two-tailed test with α = .05.

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Answer #1

Here degrees of freedom, df = 30 -1 = 29

This is two tailed test, for α = 0.05 and df = 29
Critical value of t are -2.045 and 2.045.
Hence reject H0 if t < -2.045 or t > 2.045

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