The following data represents the man-hours that are lost weekly in 10 companies that assemble computers before and after a certain security program was implemented:

45 and 36; 73 and 60; 46 and 44; 124 and 119; 33 and 35; 57 and 51; 83 and 77; 34 and 29; 26 and 24; 17 and 11

With a significance level of 5% test whether the security program is effective.