E Homework: Ch 11 HW: Two Question 4, 11.2.4-T Sample Procedure Part 2 of 7 Assume that the differences are normally distributed. Complete parts (a) through (d) below. Observation 1 2 3 4 5 6 7 8 Xi 47.0 51.4 42.9 43.1 50.6 46.7 46.2 50.4 Y; 51.9 53.2 47.2 47.2 50.4 50.9 49.1 50.1 (a) Determine di = X; - Y for each pair of data. Observation 2 3 4 5 6 7 8 d; - 4.9 - 1.8 - 4.3 - 4.1 0.2 - 4.2 - 2.9 0.3 (Type integers or decimals.) (b) Compute d and Sa. d = (Round to three decimal places as needed.)