Explain what the coefficient of determination is and how to interpret it. If Professor Caufield had a null hypothesis of D=0 and calculated a confidence interval of CI 95%= (10.89, 29.01), what conclusions can you draw about the study? Explain the difference between the repeated-measure t-test and the independent-samples t-test. Explain why it can be beneficial to use regression & the line of best fit. Explain what the probability level means. Why is it important for hypothesis testing