Examlex
If the sentence is limited enough to be the topic sentence of a good paragraph, select "good topic sentence." If the sentence is NOT limited enough to be the topic sentence of a good paragraph, select "needs revision." An effective salesperson knows the product, listens to the customer, and helps the customer find what he or she needs.
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.
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