- 12.A quality improvement consultant has promised that his techniques will reduce variance in a particular process. Prior to implementation, the variance in this process was 28. A random sample of 80 observations drawn from this process exhibited a sample variance of 22. If alpha was set at 0.05, a test of H0: 62 2 28 would imply that the consultant's techniques process variance. 1. OReduced 2. OIncreased 3. ODidn't change 4. OMultiplied 5. ONone of the above