The article “Influence of Penetration Rate on Penetrometer
Chapter 5, Problem 12E(choose chapter or problem)
The article “Influence of Penetration Rate on Pen- etrometer Resistance” (J. Oliveira, M. Almeida, et al., Journal of Geotechnical and Geoenvironmen- tal Engineering, 2011:695–703) presents measures of penetration resistance for a certain fine-grained soil. Fifteen measurements, expressed as a multiple of a standard quantity, had a mean of 2.64 and a standard deviation of 1.02. Find a 95% confidence interval for the mean penetration resistance for this soil.
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