Stratified Sampling Is a Statistical Technique That May Be More

Multiple Choice

Stratified sampling is a statistical technique that may be more efficient than unstratified sampling because it usually:

A) yields a weighted sum of the strata standard deviations that is greater than the standard deviation of the population.
B) increases the variability among items in a stratum by grouping sampling units with similar characteristics.
C) produces an estimate having a desired level of precision with a smaller sample size.
D) is applied to populations where many monetary errors are expected to occur.