# Construct a 99 confidence interval about the population mean difference statistics homework help

The following data represent the muzzle velocityâ€‹ (in feet perâ€‹ second) of shells fired from aâ€‹ 155-mm gun. For eachâ€‹ shell, two measurements of the velocity were recorded using two different measuringâ€‹ devices, resulting in the following data.

Observation

1           2            3         4          5            6

793.4    793.7    793.4    790.1      794.3   790.8

800.0    796.1   792.6      786.4    799.9    795.2

â€‹(a) Construct aâ€‹ 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 three decimal places as needed.)

Choose the statement that best agrees with your interpretion of your results.

A) I amâ€‹ _% confident that the mean difference in measurement lies in the interval found above.

B) I amâ€‹ _% confident that the mean difference in measurement lies in the interval found above.

C) I am _â€‹% confident that the mean difference in measurement is 0.

D) I am _% confident that the mean difference in measurement is 0.01