solve d.

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 790.6 794.8 794.2 793.4 794.9 791.9 791.3 793.1 802.8 789.3 803.5 791.1 Do not reject Ho. There is not sufficient evidence at the a = 0.01 level of significance to conclude that there is a difference in the measurements of velocity between device A and device B. (c) Construct a 99% confidence interval about the population mean difference. Compute the difference as device A minus device B. Interpret your results. The lower bound is - 10.82. The upper bound is 7.06 . (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. 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 is 0.01. D. One can be 99% confident that the mean difference in measurement lies in the interval found above. 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 0 2 4 6 1 10 8 6 4 2 0 2 4 [ Differences Differences O c. OD. 10 -8 6 -4 -2 0 2 4 6 10 -8 6 4 -2 0 2 4 6 0 Differences Differences