A Playa, with Its Deposits of Gypsum and Halite, May

question 57

Multiple Choice

A playa, with its deposits of gypsum and halite, may form in a

• A) yardang.
• B) ventifact.
• C) deflation.
• D) pan.

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Definitions:

Sampling Error

The difference between a population parameter and a sample statistic that results from selecting a sample.

Expected Value

The predicted average outcome of a random variable, computed as the weighted average of all possible values.

Stratified Random Sampling

A probability sampling method in which the population is first divided into strata and a simple random sample is then taken from each stratum.

Strata

Subsets of a population that are known to be homogeneous with respect to some characteristic, used in stratified sampling.