Two different procedures have been proposed for assembling a small subassembly.

Which procedure is more efficient - the procedure developed by A1 (designated as procedure number 1) or the procedure developed by A2 (designated as procedure number 2)?

To objectively evaluate the two proposed methods, it was decided to conduct time and motion studies on a few sub assemblies.

Assume the following observations:

Sample 1: n1 = 35; mean sample=4 and variance=1.5

Sample 1: n2 = 32; mean sample=5 and variance=1.8

By using p value approach at 5% test whether there is any difference between the mean assembly times per unit for two procedures