Which of the Following Materials Has Moderate to High Porosity

question 2

Multiple Choice

Which of the following materials has moderate to high porosity but low permeability?

• A) fractured sandstone
• B) uncompacted clays
• C) well-sorted gravel
• D) well-sorted sand

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Definitions:

Expected Value

The average of all possible outcomes of a random variable, weighted by their respective probabilities.

Sample Proportions

Statistics used to estimate the fraction or percentage of a population that exhibits a particular characteristic, based on a sample.

Population Proportions

The fraction or percentage of members in a population that exhibit a particular characteristic.

P-value

A measure in statistical hypothesis testing representing the probability of observing test results at least as extreme as the results actually observed, under the assumption that the null hypothesis is correct.