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honeycfa

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tT
发表于 2010-4-16 08:22 | 只看该作者

Reading 10: Sampling and Estimation LOS c习题精选

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LOS c: Distinguish between time-series and cross-sectional data.

Monthly Gross Domestic Product (GDP) figures from 1990-2000 are an example of:

A)

cross-sectional data.

B)

time-series data.

C)

systematic data.

A time-series is a group of observations taken at specific and equally spaced points in time. Cross-sectional data are observations taken at a single point in time.

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honeycfa

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发表于 2010-4-16 08:23 | 只看该作者

The sample of per square foot sales for 100 U.S. retailers in December 2004 is an example of:

A)

unbiased data.

B)

cross-sectional data.

C)

time-series data.



Cross-sectional data are a sample of observations taken at a single point in time. A time-series is a sample of observations taken at specific and equally spaced points in time.

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zaestau

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3#
发表于 2010-4-29 10:32 | 只看该作者
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