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Related Concept Videos

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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One-Way ANOVA: Unequal Sample Sizes01:15

One-Way ANOVA: Unequal Sample Sizes

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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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Test for Homogeneity01:23

Test for Homogeneity

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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...
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Sample Size Calculation01:19

Sample Size Calculation

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Knowledge of the sample size is the first requirement to conduct random sampling or an experiment. The sample size is the total number of units, observations, or groups (in some cases) used to get the data to estimate a population parameter. As the name suggests, the sample size is that of the sample drawn from the population and differs from the population size.
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Bonferroni Test01:10

Bonferroni Test

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The Bonferroni test is a statistical test named after Carlo Emilio Bonferroni, an Italian mathematician best known for Bonferroni inequalities. This statistical test is a type of multiple comparison test to determine which means are different than the rest. Bonferroni test can minimize the Type 1 error by reducing the significance level alpha, which otherwise increases with sample pairs.
The means of different samples are first paired in all possible combinations.
The null hypothesis of the...
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Sampling Plans01:23

Sampling Plans

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Sampling is a crucial step in analytical chemistry, allowing researchers to collect representative data from a large population. Common sampling methods include random, judgmental, systematic, stratified, and cluster sampling.
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A statistical test and sample size recommendations for comparing community composition following PCA.

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Related Experiment Video

Updated: Oct 21, 2025

A Method for Investigating Age-related Differences in the Functional Connectivity of Cognitive Control Networks Associated with Dimensional Change Card Sort Performance
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Correction: A statistical test and sample size recommendations for comparing community composition following PCA.

John R Skalski, Shelby M Richins, Richard L Townsend

    Plos One
    |September 1, 2021
    PubMed
    Summary
    This summary is machine-generated.

    This study corrects a previously published article DOI. The correction ensures accurate referencing for scientific literature. Researchers should use the updated DOI for all citations.

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    Area of Science:

    • Bibliometrics
    • Scientific Publishing

    Context:

    • Accurate citation is crucial for scientific integrity.
    • Digital Object Identifiers (DOIs) ensure persistent linking to research articles.

    Purpose:

    • To provide a correction for a specific article's DOI.
    • To ensure proper attribution and discoverability of scientific work.

    Summary:

    • A correction has been issued for the DOI of a published article.
    • This ensures that the article can be accurately located and cited by the scientific community.

    Impact:

    • Improves the reliability of scientific records.
    • Facilitates accurate retrieval of research for future studies.