> The question is to determine whether emission reductions from two > different fuels are statistically significant. > > The test procedure was: the emissions of 12 similar engines were > tested twice, first with a normal fuel (Fuel A) and second time with > an improved formula (Fuel B). The results showed that on average the > reductions in emissions when using fuel B was significantly lower.
Have You considered uncertainty in analytical measurements ? . . ================================================================= Instructions for joining and leaving this list, remarks about the problem of INAPPROPRIATE MESSAGES, and archives are available at: . http://jse.stat.ncsu.edu/ . =================================================================
