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 d Subscript i negative . 4 . 9 negative 3.4 negative 3.8 . 5 negative 2.3 negative 2.8 (Type integers or decimals. Do not round.) Part 2 (b) Compute d overbar and s Subscript d. d overbarequals negative 1.614 (Round to three decimal places as needed.) Part 3 s Subscript dequals 1.920 (Round to three decimal places as needed.) Part 4 (c) Test if mu Subscript dless than0 at the alphaequals0.05 level of significance. Determine the null and alternative hypotheses. Choose the correct answer below. A. Upper H 0: mu Subscript dless than0 Upper H 1: mu Subscript dequals0 B. Upper H 0: mu Subscript dless than0 Upper H 1: mu Subscript dgreater than0 C. Upper H 0: mu Subscript dequals0 Upper H 1: mu Subscript dless than0 Your answer is correct.D. Upper H 0: mu Subscript dgreater than0 Upper H 1: mu Subscript dless than0 Part 5 Determine the test statistic. The test statistic is enter your response here. (Round to two decimal places as needed.)