The following observations show the number of traffic violations given for speeding on the one interstate highway going through Smallvilleby Officers Dhondt and Meridithof the Police Department over the last 5 months:
Dhondt 30 22 25 19 26
Meridith 26 19 20 15 19
At the .05 level of significance, is there a difference in the mean number of citations given by the two officers? Assume the population of differences is normal.