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関連する概念動画

One-Way ANOVA: Unequal Sample Sizes01:15

One-Way ANOVA: Unequal Sample Sizes

6.6K
One-way ANOVA can be performed on three or more samples of unequal sizes. However, calculations get complicated when sample sizes are not always the same. So, while performing ANOVA with unequal samples size, the following equation is used:
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One-Way ANOVA: Equal Sample Sizes01:15

One-Way ANOVA: Equal Sample Sizes

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One-Way ANOVA can be performed on three or more samples with equal or unequal sample sizes. When one-way ANOVA is performed on two datasets with samples of equal sizes, it can be easily observed that the computed F statistic is highly sensitive to the sample mean.
Different sample means can result in different values for the variance estimate: variance between samples. This is because the variance between samples is calculated as the product of the sample size and the variance between the...
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Bias01:22

Bias

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Bias refers to any tendency that prevents a question from being considered unprejudiced. In research, bias occurs when one outcome or answer is selected or encouraged over others in sampling or testing. Bias can occur during any research phase, including study design, data collection, analysis, and publication.
In statistics, a sampling bias is created when a sample is collected from a population, and some members of the population are not as likely to be chosen as others (remember, each member...
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Randomized Experiments01:13

Randomized Experiments

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The randomization process involves assigning study participants randomly to experimental or control groups based on their probability of being equally assigned. Randomization is meant to eliminate selection bias and balance known and unknown confounding factors so that the control group is similar to the treatment group as much as possible. A computer program and a random number generator can be used to assign participants to groups in a way that minimizes bias.
Simple randomization
Simple...
8.8K
Test for Homogeneity01:23

Test for Homogeneity

2.3K
The goodness–of–fit test can be used to decide whether a population fits a given distribution, but it will not suffice to decide whether two populations follow the same unknown distribution. A different test, called the test for homogeneity, can be used to conclude whether two populations have the same distribution. To calculate the test statistic for a test for homogeneity, follow the same procedure as with the test of independence. The hypotheses for the test for homogeneity can...
2.3K
Testing a Claim about Population Proportion01:24

Testing a Claim about Population Proportion

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A complete procedure for testing a claim about a population proportion is provided here.
There are two methods of testing a claim about a population proportion: (1) Using the sample proportion from the data where a binomial distribution is approximated to the normal distribution and (2) Using the binomial probabilities calculated from the data.
The first method uses normal distribution as an approximation to the binomial distribution. The requirements are as follows: sample size is large...
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Updated: Jan 8, 2026

The Joint Effect of Social Comparison and Social Distance on Evaluation of Intertemporal Choice Outcomes in Event-related Potential Studies
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小規模サブグループにおける反事事実践公平性

Solvejg Wastvedt1, Jared D Huling1, Julian Wolfson1

  • 1Division of Biostatistics and Health Data Science, University of Minnesota,  2221 University Ave SE, Minneapolis, MN 55414, United States.

Biostatistics (Oxford, England)
|December 15, 2025
PubMed
まとめ
この要約は機械生成です。

新しい手法は、特に小規模で疎外されたグループのリスク予測モデルの公平性評価を改善します。このアプローチは、アルゴリズムの公平性におけるデータの制限と統計的な課題に対処することにより、臨床的意思決定を強化します。

キーワード:
アルゴリズムの公平性因果推論リスク予測小規模サブグループ

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Last Updated: Jan 8, 2026

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科学分野:

  • ヘルスインフォマティクス
  • 生物統計学
  • 機械学習倫理

背景:

  • リスク予測モデルの既存の公平性指標は、小規模で疎外されたサブグループではうまく機能しません。
  • 臨床応用では、治療の交絡を考慮した公平性評価が必要です。
  • サンプルサイズの制限は、脆弱な人口に対する差別の是正を妨げます。

研究 の 目的:

  • 小規模サブグループにおけるリスク予測モデルの差次的パフォーマンスを評価および修正するための新しい手法を開発すること。
  • リスク予測モデルの臨床応用における統計的課題に対処すること。
  • ヘルスケアにおける疎外されたグループのアルゴリズムの公平性を強化すること。

主な方法:

  • 複数のグループにわたる情報源を活用する新しい推定量を提案しました。
  • 従来の技術よりも多くのデータ量を使用して公平性の数量を推定しました。
  • 結果がない外部データを使用した新しいデータ借用アプローチを導入しました。

主要な成果:

  • 開発された手法により、小規模サブグループにおける公平性の評価が可能になります。
  • このアプローチは、外部データを効果的に組み込んで推定を改善します。
  • COVID-19パンデミック中に使用された実際の臨床リスク予測モデルに適用されました。

結論:

  • 提案された3段階のアプローチは、臨床リスク予測におけるアルゴリズムの公平性を達成する能力を高めます。
  • この方法論は、特に脆弱な集団における既存の技術の重要な制限に対処します。
  • この発見は、公平なヘルスケア提供と治療ガイダンスに重要な影響を与えます。