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 4 5 6 A 793.4 790.6 792.8 792.6 793.9 793.7 B 793.6 789.8 801.2 789.3 800.1 792.2 Click the icon to view the table of critical t-values. c) Construct a 99% confidence interval about the population mean difference. Compute the difference as device A minus device B. Interpret your results. The confidence interval is (). (Round to two decimal places as needed.) Interpret the confidence interval. Choose the correct answer below. O A. One can be 99% confident that the mean difference in measurement is 0.01. O B. One can be 1% confident that the mean difference in measurement lies in the interval found above. O C. One can be 99% confident that the mean difference in measurement lies in the interval found above. O D. One can be 99% confident that the mean difference in measurement is 0. d) Draw a boxplot of the differenced data. Does this visual evidence support the results obtained in part (b)? O A. O B. 10 8 6 4 2 10 8 6 4 2 0 2 4 Differences Differences an ds Time Remaining: 01:30:42 Next