Degrees of freedom

1. What do degrees of freedom (df) mean? Canbulat a al. (2015) did not provide the dft in their study. Why is it important to know the cif for a t ratio? Using the dfformula, calculate the df for this study. 2. What are the means and standard deviations (SDs) for age for the Buzzy intervention and control groups? What statistical analysis is conducted to determine the difference in means for age for the two groups? Was this an appropriate analysis technique? Provide a rationale for your answer. 3. What are the t value and p value for age? What do these results mean? 4. What are the assumptions for conducting the independent samples t-test?