Compressive strength of concrete is affected by several factors, including compo
ID: 3368364 • Letter: C
Question
Compressive strength of concrete is affected by several factors, including composition (sand, cement, etc.), mixer type (batch vs. continuous), and curing procedure. Accordingly, a concrete company is conducting an experiment to determine how mixing technique affects the resulting compressive strength. Four potential mixing techniques have been identified. Subsequently, samples of 20 specimens have been subjected to each mixing technique, and the resulting compressive strengths (in pounds per square inch, psi) were measured. The data are shown in the accompanying table.
Use Excel to generate the appropriate ANOVA table. Assume compressive strengths are normally distributed. (Leave no cells blank - be certain to enter "0" wherever required. Round your answers for SS and MS to 1 decimal places, F crit to 2 decimal places, and F andp-value to 4 decimal places.)
Total
I solved the answer except for the (within groups) SS column I end up with 1,470,686. Unfortunately, the answer needs to have the entire number with rounded to the fourth decimal. I've solved a dozen times with the answer not ending with any decimals.
Compressive strength of concrete is affected by several factors, including composition (sand, cement, etc.), mixer type (batch vs. continuous), and curing procedure. Accordingly, a concrete company is conducting an experiment to determine how mixing technique affects the resulting compressive strength. Four potential mixing techniques have been identified. Subsequently, samples of 20 specimens have been subjected to each mixing technique, and the resulting compressive strengths (in pounds per square inch, psi) were measured. The data are shown in the accompanying table.
Explanation / Answer
Solution:Using excel the given table for the Anova.
Source of Variation SS df MS F P-value F crit at 5% Between Groups 207911.6 3 69303.9 3.5814 0.0176 2.72 Within Groups 1470685.9 76 19351.1 Total 1678597.5 79Related Questions
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