Four undisturbed samples were taken from a stiff clay deposit. Un- drained triaxial tests on these samples gave the following values for cus the undrained shear strength values: 102, 98, 95, 109 (kN/m²). Determine the minimum number of samples of the clay that should be taken so that, within a 95% probability, the average in-situ undrained shear strength value will be within 5% of the mean test result.

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Four undisturbed samples were taken from a stiff clay deposit. Un-
drained triaxial tests on these samples gave the following values for cus
the undrained shear strength values:
102, 98, 95, 109 (kN/m²).
Determine the minimum number of samples of the clay that should be
taken so that, within a 95% probability, the average in-situ undrained
shear strength value will be within 5% of the mean test result.
Transcribed Image Text:Four undisturbed samples were taken from a stiff clay deposit. Un- drained triaxial tests on these samples gave the following values for cus the undrained shear strength values: 102, 98, 95, 109 (kN/m²). Determine the minimum number of samples of the clay that should be taken so that, within a 95% probability, the average in-situ undrained shear strength value will be within 5% of the mean test result.
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