Use a t-distribution to answer this question. Assume the samples are random samples from distributions that are reasonably normally distributed, and that a t-statistic will be used for inference about the difference in sample means. State the degrees of freedom used. Find the endpoints of the t-distribution with 2.5% beyond them in each tail if the samples have sizes n, 17 and ny 23. A. What are the degrees of freedom? B. What are the endpoints? Round your answer for the endpoints to three decimal places.