Data Scatter and Statistical Considerations
摘要
If five specimens of the same material, size and surface finish were subjected to the same fatigue test, it is likely that there would be five different results. If the test pieces were ten, then it is likely that there would be ten different results. Increasing the number of specimens will not change this general outcome and new values, higher and lower, will be added. Therefore, also the spread between the maximum and the minimum value will increase, albeit most values will appear closely-spaced.