Two different procedures have been proposed for assembling a new telephone set. The question is; is there a difference in the meantime to assemble the phone set. The first
procedure is (Procedure 1) and the second is (Procedure 2). To evaluate the two proposed

methods, it was decided to conduct a time and motion study. A sample of five employees was

timed using procedure 1 and six were timed using procedure 2. The results in minutes are shown below,

Procedure 1 (minutes) Procedure 2 (minutes)

P1 P2
2 3

4 7

9 5

3 8

2 4

3

Note: the last number (3) is under P2.
Is there a difference in the mean assembling times? alpha = 0.05​