Problem 12E

The article “Influence of Penetration Rate on Penetrometer Resistance” (J. Oliveira, M. Almeida, et al., Journal of Geotechnical and Geoenvironmental 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.

GEOL 207 Nitrogen Nitrogen Cycle NOx NO3- = Nitrate - Plants - HNO3 -- > Nitric Acid - Fully oxidized form of nitrogen - 7 Million tons - In atmosphere from N-Oxides - Salts (fairly rare) o KNO3 o NaNO3 Guano (fossilized bird/bat poop) - Fertilizers - Explosives o Oxygen in Nitrate o...