Assume that the paired data came from a population that is normally distributed. Using a 0.05 significance level find the mean value of the differences d for the paired sample data, the standard deviation of the differences d for the paried sample data, the t test statistic, and the critical values to test the claim that ?d=0.
xi 14,17,4,13,14,17,15,14
yi 13,13,9,8,14,13,10,15