Statistics Tip of the Week: What ANOVA does and does not do

10/26/2016

The concept of ANOVA can be confusing in several aspects. To start with, its name is an acronym for "ANalysis Of VAriance", but it is not used for analyzing Variances. (F and Chi-square tests are used for that.) ANOVA is used for analyzing Means. The internal calculations that it uses to do so involve analyzing Variances -- hence the name.

The 1st column in the following table describes what ANOVA does do.
The 2nd column says what ANOVA does not do.
The 3rd column tells what to use if we want do what's in the 2nd column.

8 Comments

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9/18/2018 06:10:06 am

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malik abu bakar link

2/3/2021 08:54:07 pm

Hello

A gigantic number of the tests like Dunnett's, Scheffe's bit of leeway that the get-together size should be the equivalent.

Does it construe that these tests can't be run if my starters contrast in the measure of tests?
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They contrast between 4 to 6.

Everything pondered what may it be reasonable for me to do?

I need to see that authentic assessments has made my life so immediate, taking out all the strain of how to do post hoc ANOVA.

I truly need to offer my appreciation to you for your cause to share information.

As dependably the solution for your solicitations rely on the thing you are attempting to delineate/test.

It seems like you have three segments (for example free factors): cross-district, tallness, instrument. Speed is the poverty stricken variable.

In the event that you need to value the joint endeavors between these segments, by then you without a doubt should utilize a 3 factor ANOVA (rather than a one-factor ANOVA).

You may also have a fourth factor, explicitly time, in spite of the way that this might be essentially indistinguishable from the cross-zone factor.

Ana Carol link

4/24/2023 05:35:34 am

Dunnett's and Scheffe's tests assume equal group sizes, but that doesn't mean they can't be run if your sample sizes differ slightly. However, if the sample sizes are significantly different, then you may need to use a different post-hoc test. Can you provide more details on the sizes of your samples and the specific analysis you are trying to conduct?

Manjit kaur link

2/12/2023 09:38:08 pm

I read an article about Data Science from your blog post. thanks for sharing such a beautiful post...

Manjit kaur link

2/14/2023 09:35:20 pm

simply explained in a concise manner, I like your blog post. it's very useful & informative. thank you for sharing Amazing Content.

Sarthak link

2/19/2023 09:56:57 pm

got to learn something new about statistics, thanks

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5/24/2023 01:20:42 am

Great! Learned a lot from this...

Sains Data link

4/24/2025 07:05:21 am

Why is ANOVA named 'Analysis of Variance' if it is used to compare means?
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Statistics Tip of the Week: What ANOVA does and does not do

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