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The critical region, critical value, and significance level are interdependent concepts crucial in hypothesis testing.
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Critical Values01:31

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Understanding the maximum and minimum values of a function is essential for analyzing its overall behavior. These values, often referred to as extrema, provide insight into how a function behaves across its domain. In mathematical terms, extrema can be either local—representing peaks and valleys within a limited region—or absolute, indicating the highest or lowest points over an entire interval.A function’s extrema occur at critical numbers, which are values in the domain...
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Updated: May 6, 2026

Behavioral Assessment of Hearing in 2 to 4 Year-old Children: A Two-interval, Observer-based Procedure Using Conditioned Play-based Responses
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[Minimum thresholds under scrutiny].

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    Area of Science:

    • Health Services Research
    • Health Policy
    • Medical Economics

    Background:

    • Minimum volume thresholds (MVTs) for medical procedures are mandated in Germany.
    • The catalogue of procedures subject to MVTs has evolved since 2004.
    • Currently, 8 procedures are included in the MVT catalogue.

    Purpose of the Study:

    • To examine the decision-making basis for including procedures in the MVT catalogue.
    • To analyze the determination of minimum volume thresholds.
    • To compare existing evidence with current regulatory practices.

    Main Methods:

    • Review of systematic reviews published in 2012 on volume-outcome correlations.
    • Analysis of the Federal Joint Committee's regulatory framework.
    • Comparison of evidence with current German healthcare policy.

    Main Results:

    • Evidence from 2012 systematic reviews on volume-outcome relationships is presented.
    • The study assesses how this evidence aligns with current MVT regulations.
    • Continuous changes in the MVT catalogue are noted.

    Conclusions:

    • The study provides an overview of the evidence base for MVTs in Germany.
    • It critically evaluates the alignment of regulatory decisions with scientific findings.
    • Recommendations for future MVT policy may be inferred.