Mathematics, 10.03.2020 00:56, xxcecccc

The article "Influence of Penetration Rate on Penetrometer Resistance," 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. (Assume the measurements are a random sample from a normal population).
Find a 95% of confidence interval for the mean penetration resistance for this soil.

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The article "Influence of Penetration Rate on Penetrometer Resistance," presents measures of penetra...