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26.11.2019 •
Mathematics
The article "influence of penetration rate on penetrometer resistance" (j. oliveira, m. almeida, et al., journal of geotechnical and geoenvironmental engineering, 2011: 695â703) presents measures of navidi-3810214 book november 11, 2013 14: 8 446 chapter 6 hypothesis testing penetration resistance, expressed as a multiple of a standard quantity, for a certain fine-grained soil. fifteen measurements taken at a depth of 1 m had a mean of 2.31 with a standard deviation of 0.89. fifteen measurements taken at a depth of 2 m had a mean of 2.80 with a standard deviation of 1.10. can you conclude that the penetration resistance differs between the two depths?
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Ответ:
The answer would be A. 1 1/5
Step-by-step explanation:
48/40 = 1 8/40
1 8/40 Simplify to 1 1/5