Frequently Asked Questions

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Was the option that was altered developed specifically to handle the impact of the terrorist attacks?

No. This option is used as a part of standard seasonal adjustment procedures at the Census Bureau but with a more conservative (restrictive) definition of what constitutes an untypical month. For these months, a definition of untypical was used that is customary in statistical practice when there is advance knowledge that the month's survey value has a strong potential to be untypical.

For more information, visit the Monthly and Annual Retail Trade website.


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