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An estimate of variation due to testing, the within-test 5.
In where s is the statistical average standard deviation, or Eq. The required psithe coefficient of variation is preferred. An example is also given for a mixture 4. Estimating wci standard deviation using at least 30 tests is preferable. There is a very example, assume sufficient data exist for which a coefficient high probability of such an occurrence on most projects, and of variation 8.
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Individual criterion see 4. These changes will not reveal day-to-day mixture materials or proportions will have a larger effect on differences in testing, curing, capping, and testing proce- the average strength level than on the standard deviation.
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