The following data represent the muzzle velocity (in feet per second) of rounds fired from a 155-mm gun. For each round, two measurements of the velocity were recorded using two different measuring devices, resulting in the following data. Complete parts (a) through (d) below. Observation 1 2 3 5 6 0 A 793.2 791.3 791.1 791,3 790.6 794.3 B 802.5 789.5 796.8 787.9 791.5 790.6 (a) Why are these matched-pairs data? O A. All the measurements came from rounds fired from the same gun. O B. The measurements (A and B) are taken by the same instrument. O C. Two measurements (A and B) are taken on the same round. O D. The same round was fired in every trial. (b) Is there a difference in the measurement of the muzzle velocity between device A and device B at the a = 0.01 level of significance? Note: A normal probability plot and boxplot of the data indicate that the differences are approximately normally distributed with no outliers. Let di = A; - Bj. Identify the null and alternative hypotheses. Ho: Hd H1: Hd Determine the test statistic for this hypothesis test. to =(Round to two decimal places as needed.) Find the P-value. P-value = (Round to three decimal places as needed.) What is vour conclusion regarding H