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heteroscedasticity

 

Definitions from the Web

Heteroscedasticity

Definition:

Heteroscedasticity refers to a statistical phenomenon where the variability of a variable's error terms, or residuals, differs across the range of values of an independent variable.

Senses and Usages:

  1. Statistical Sense:

    In statistics, heteroscedasticity occurs when the variation in the residuals of a regression model is not constant across different levels of the independent variable. It violates the assumption of homoscedasticity, where the residuals have constant variance.

    Example Sentence: The scatterplot revealed the presence of heteroscedasticity, indicating that the assumption of equal variances across the predictor variables was violated.

  2. Popular Sense:

    Heteroscedasticity is commonly referred to in popular discussions as the phenomenon of unequal scatter or variation in a data set, indicating that the spread of data points changes as the value of the independent variable changes.

    Example Sentence: The popular belief suggests that heteroscedasticity in real estate prices often occurs due to differences in neighborhood desirability and housing conditions.

  3. Local Sense:

    In local contexts, heteroscedasticity may refer to the specific manifestation of the statistical phenomenon within a particular region or subset of data.

    Example Sentence: The local study analyzing educational outcomes found evidence of heteroscedasticity among students belonging to rural areas, indicating differing factors affecting academic performance.

Related Products:

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