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Reference.org
Modifiable temporal unit problem
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<p>The Modified Temporal Unit Problem (MTUP) is a source of <a href="/facts/Statistical_bias/Pql981K3">statistical bias</a> that occurs in time series and <a href="/facts/Spatial_analysis/R6rlDzRl">spatial analysis</a> when using temporal data that has been <a href="/facts/Aggregate_data/yh9D5zaP">aggregated</a> into <a href="/facts/Unit_of_time/L9ShSGBv">temporal units</a>. In such cases, choosing a temporal unit (e.g., days, months, years) can affect the analysis results and lead to inconsistencies or errors in <a href="/facts/Statistical_hypothesis_testing/yv9RPF6U">statistical hypothesis testing</a>. </p>