Question

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	793.2793.2	791.3791.3	791.3791.3	792.4792.4	790.8790.8	792.1792.1
B	801.6801.6	791.1791.1	798.5798.5	787.7787.7	795.2795.2	789.5789.5

​

​(b) Is there a difference in the measurement of the muzzle velocity between device A and device B at the α=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 d=A−B

Identify the null and alternative hypotheses.

Answer 1