Precision Estimates of AASHTO T267: Determination of Organic Content in Soils by Loss on Ignition (2010) / Chapter Skim
Currently Skimming:
Pages 4-10
The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.
From page 4... ...
10 CHAPTER 3- INTERLABORATORY TEST RESULTS AND ANALYSIS 3.1 Test Data The test data collected from laboratories included three replicate measurements of organic content of 12 soil-organic material blends consisted of three soil types and four percentages of ground walnut shells. This totaled in 36 measurement data from each laboratory.
|
From page 5... ...
11 contents, the average of the measured values agree closely with the design values as shown in table of the adjusted values (Table 3-2)
|
From page 6... ...
12 3.4 Statistical Tests for Significance Tests of statistical significance on the ILS data were performed using t-test and F-test. All t-tests assumed an independent one-sample t distribution for 1% level of significance.
|
From page 7... ...
13 significance are shown in Table 3-4 through Table 3-10 and are discussed in the following sections. 3.4.2.1 Comparison of the Standard Deviations of Clay Blends The results of F-test on within and between-laboratory standard deviations of organic content measurements of clay blends are shown in Table 3-4 and Table 3-5.
|
From page 8... ...
14 Table 3-7: Results of F-test on comparison of between-laboratory variability of measurements on silt for 1% level of significance Compare Between Standard Deviation Degrees of Freedom Critical F Computed F (SR) Rejection Probability Decision 2% vs.
|
From page 9... ...
15 different percentages of organic material were not significantly different. In this respect, the variability values were combined as presented in Table 3-10.
|
From page 10... ...
16 laboratory estimate of variability (1s) and the allowable difference between two results (d2s)
|
Key Terms
This material may be derived from roughly machine-read images, and so is provided only to facilitate research.
More
information on Chapter Skim is available.