In Exercise 3, you worked with summary data from a study conducted by Willoughby, Porter, Belsito, and
Question:
1. Calculate the degrees of freedom.
2. Use Table B in Appendix C of your textbook to identify the critical t value for a two-tailed test with alpha equal to .05.
3. Calculate the pooled variance estimate.
4. Calculate the estimated standard error.
5. Calculate the 95% confidence interval.
6. Provide a verbal interpretation of the confidence interval.
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1 df 28 2 Critical t 2048 3 Pooled variance estimate ...View the full answer
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