The following data represent the muzzle velocity(in feet persecond) of rounds fired from a155-mm gun. For eachround, two measurements of the velocity were recorded using two different measuringdevices, resulting in the following data. Complete parts(a) through(d) below.

Observation

A

790.8

791.7

791.8

794.2

794.8

791.6

B

797.0

790.8

797.6

789.6

795.2

790.8

Determine the test statistic for this hypothesis test.