content area top Part 1 Assume that the differences are normally distributed. Complete parts (a) through (d) below. Observation 1 2 3 4 5 6 7 8 Upper X Subscript i 48.4 43.5 46.1 49.1 51.8 51.9 53.2 43.4 Upper Y Subscript i 53.3 45.3 47.6 53.7 53.4 54.4 54.4 45.2 Question content area bottom Part 1 (a) Determine d Subscript i Baseline equals Upper X Subscript i Baseline minus Upper Y Subscript i for each pair of data. Observation 1 2 3 4 5 6 7 8 d Subscript i negative 4.9 negative 1.8 negative 1.5 negative 4.6 negative 1.6 negative 2.5 negative 1.2 negative 1.8 (Type integers or decimals.) Part 2 (b) Compute d overbar and s Subscript d. d overbarequals negative 2.488 (Round to three decimal places as needed.) Part 3 s Subscript dequals 1.447 (Round to three decimal places as needed.) Part 4 (c) Test if mu Subscript dless than0 at the alphaequals0.05 level of significance. What are the correct null and alternative hypotheses? A. Upper H 0: mu Subscript dequals0 Upper H 1: mu Subscript dless than0 Your answer is correct.B. Upper H 0: mu Subscript dgreater than0 Upper H 1: mu Subscript dless