A Sample Is to Be Selected from a Large Population

question 10

Multiple Choice

A sample is to be selected from a large population using simple random sampling.The proportion of subjects in the sample that have a given characteristic is to be calculated.Which of the following best describes the sample proportion?

• A)It is a parameter.
• B)It is a statistic,which is unbiased for the population parameter only if the population is at least 100 times larger than the sample.
• C)It is a statistic that is unbiased,and its variability does not depend on the population size provided the population is at least 100 times larger than the sample.
• D)It is a lurking variable whose value is unknown.
• E)It is a statistic,but its behavior cannot be determined because only one sample is to be taken.

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