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7.1 (20.19) - 20 points: The shear stresses, in kilopascals (kPa), of nine specimens taken at various depths in a clay stratum are listed below. Estimate the shear stress at

a depth of 4.5 m. (a) Using octave function compute various statistics (mean, variance, correlation) and plothistograms of the data sets.

Fig: 1

Fig: 2

Fig: 3