An experimenter measures the compressibility of 16 samples of clay randomly selected from a particular location, and

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An experimenter measures the compressibility of 16 samples of clay randomly selected from a particular location, and they have a sample mean of 76.99 and a sample standard deviation of 5.37. Does this provide sufficient evidence for the experimenter to conclude that the average clay compressibility at the location is less than 81?
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