Also compute a 95% confidence interval about the population mean difference? What would the lower and upper bound be?

Assume that the differences are normally distributed. Complete parts (a) through (d) below. Observation COL 49.3 44.9 47.6 49.9 54.3 43.2 45.3 45.9 519 461 49.9 53.8 53.4 46.1 47.1 45.2 (a) Determine d. = X - Y; for each pair of data Observation N + (Type integers or decimals.) (b) Compute d and S.. d-(Round to three decimal places as needed.) Sa = (Round to three decimal places as needed.) (c) Test if u. = 0 at the a = 0.05 level of significance What are the correct null and alternative hypotheses? O A. Ho: Ha = 0 O B. Ho: Ha = 0 H , : HQ = 0 H1 : Ha = 0 O C. Ho: Hq > 0 O D. Ho Ha = 0 Hy : Ha