Two-Way ANOVA - Full Course

What is a Two-Way ANOVA? A two-way ANOVA is a statistical method used to test the effect of two categorical variables on a continuous variable. Therefore, the Two-Way ANOVA is the extension of the One-Way ANOVA.

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► Tutorial Two-Way ANOVA:

0:00 What is a Two-Way ANOVA?
0:31 One-Way ANOVA vs. Two-Way ANOVA?
0:51 What is a factor?
2:10 When do we use a Two-Way ANOVA?
3:34 What kind of statements can we make with a Two-Way-ANOVA?
3:56 What are the Hypotheses in a Two-Way-ANOVA?
4:50 What are the assumptions in a Two-Way-ANOVA?
5:50 Example of a Two-Way-ANOVA?
6:39 How to calculate a Two-Way-ANOVA?
7:00 Calculate a Two-Way-ANOVA online with DATAtab?
8:01 How to interpret the results of a Two-Way-ANOVA?
9:30 How to calculate a Two-Way-ANOVA by hand?

[happymathsonlinetuition]

This is the most brilliant Statistics video I've ever watched. Thank you.

[mdalaminshaikh]

Just awesome. There is no words to praise your presentation ❤❤

[mattyork]

Thank you for such a clear explanation. It’s the first time I actually understood the ANOVA test. I guess I need to buy your eBook 😊

[panous]

you are truly amazing...thanks for the videos

[revisionandthewritingproce]

Your videos are always miles better than any others. Thank you!!

[thomasmatthews]

Thanks! I was having a hard time finding information specifically on effect size across multiple factors.

[dubstar]

I'm in the second semester of statistics and I just can't get my head around two way ANOVAs. I'm lost after the first couple of minutes here. Just wont work in my head.

[carlostolosa]

for 12:49 in getting df, what if we have unequal 'n' for Drug A and Drug B?

[danielyesiduribe]

Thank you very much! What tool can I use for my factors as numerical variables and my target variable a categorical one?

[duzonaleeahalessandrag.]

How do I find p and q if I have four groups with Trial 1 and trial 2?

[richard.f]

Can I consider the time as a factor? I mean, if I have an intervention, and multiple time records, and I want to understand how time and intervention affects the results, can I use a 2-way ANOVA? Or would I violate the independence assumption? (Assuming all the other assumptions were true). Also, is there a non parametric equivalent for the 2-way ANOVA, just as we have for the 1-way ANOVA?

[mikahamari]

Thank you for clear explanation. I have wondered, why there are so many similar tools in statistics, and ANOVA and linear regression feel very similar. I searched from internet, and it seems that they really are. It was said that you can do with linear regression everything that ANOVA does, and the choice is just a matter of taste. Is this true?

[ardeniawira]

Thank you very much! But what if the data is not normally distributed? What is the nonparametric test for two way ANOVA?

[sreerajnr]

At 12:40 how do we calculate 'n' if the number of elements in each group is different?

[sreerajnr]

Thankyou so much for this amazing explanation. It would be really helpful if you could answer my doubt. T-test compare the means of two groups whereas Anova compares the variance b/w and within the groups. So, at 2:04 how can T-test be an alternative for Anova? Or is it like comparing means is as useful as comparing variances to understand the effect of the category on the dependent variable?

[nipunthilakarathne]

my dependent variable is not normal. so, what check I should choose? Please reply