One Way ANOVA (Analysis of Variance): Introduction | Statistics Tutorial #25 | MarinStatsLectures

[@marinstatlectures]

In this One Way #ANOVA video we will learn about the purpose of ANOVA test, the null and alternative hypothesis in this test, and the required assumptions for ANOVA. 👉🏼 Find our ANOVA in statistics and with R Series here ( bit.ly/2zBwjgL ) 🎗Like to support us? You can Donate (bit.ly/2CWxnP2), Share our Videos, Leave us a Comment, Give us a Like or Write us a Review! Either way, We Thank You!

[@sanketsaharkars]

Thank you for creating videos on statistics, I am clearly able to understand concepts of statistics over here than in my class.

[@marinstatlectures]

you're welcome. we have videos that fill out my entire intro stats course, so you should be able to find all the supplemental material you need here :)

[@zeynepibragimkyzy1388]

Was clueless, you saved my paper! Thank you very much!

[@marinstatlectures]

good to hear! you're welcome :)

[@yetundeabass-olisa9682]

Highly informative and educative.

[@marinstatlectures]

thanks :)

[@ClaudiaGarcia-vt7fm]

Hello Marin, I wanna know about MANOVA analysis and how i can run an analysis in R, can you uploud some videos about it?

[@collincherubim2698]

At the end you mention identifying "heavier" and "lighter" subjects and randomly distributing them between the 4 groups. This seems logical and like a good method to ensure each group is representative of a larger population. However, isn't this not actually "random" at all? How do we approach this idea in the sciences? Is it better to truly randomize in which case you might get some more heavy people in one group than any of the others, or is it better to tamper and homogenize through purposeful group assignment?

[@syhusada1130]

Can I use bootstrap and permutation with multiple groups such as shown in this video?

[@alexisward6435]

Great video! Can you elaborate more on stratifying the data? How would that work if each category represents a different diet? Also--do you write backwards or do you mirror your video in-post?

[@almazababu6568]

good vedio. please would you help me how I can analysis the effect of different range of temperature on bacteria with one way anova? Thank you

[@marinstatlectures]

hi, if you can make your question a bit more specific we may be able to help. the short answer is by using *summary(aov(bacteria~temperature))* , but without knowing the structure of yoru data, etc, this is the only (generic) sort of answer i can provide

[@jessicacortes9652]

hi i have a research on motivation and its effects on job performance how can I use anova?

[@dwilliamhood]

I've been taking statistics courses since 1979 (four times in total). Over that time, I've noticed one thing that's consistent. Nobody teaches in a truly empathetic manner. Folks also use a lot of assumptive language. It's not that what's said isn't true (of course), but just because you're telling something something doesn't mean that you're really teaching. Stats experts may love this presentation, but people like me that are trying to learn get left out in the cold. :-(

[@benkojo1654]

A very good lecture

[@soumyasinha4947]

Excellent videos regarding categorical and continuous variables.cleared most of my doubts..But 1 doubt is remaining.please tell me the test to perform when x is a numerical/continuous variable and y is a categorical variable. I find this use cases in all classification problems

[@roxiefirelight]

Thank you for posting this for us. Grad student and I dont understand any of it! : )

[@marinstatlectures]

You’re welcome :) I created most of these for my grad stats courses in public health

[@Lumax96]

Hi, I've got a question about when you say "in case of non-normality": would that mean as soon as one of the groups we want to analyze has non-normal distribution that the whole set of groups has to be treated as non-normal?

[@somyajain411]

When we use median as estimate why we use a non-parametric approach or bootstrapping why not parametric?

[@marinstatlectures]

non-parametric approaches often test statements about the median. the mean is a "parameter" for a statistical probability distribution (like the normal, or t, or F,....).

[@gowthamcherukuri9878]

i love ur lecuters, but my professor told us, for anova we need to calculate the variances instead of means

[@marinstatlectures]

Hi, that is correct. ANOVA test for the equality of multiple means. in order to do so, you take the total variance in Y, and you separate it into variability that is Explained by X, and variability that is Not Explained by X. you then compare these two, to decide if you think the any of the means are different from the rest. the second video (the one that follows this) explains the concept of how the total variance in Y is separated into the two...

[@diegopenilla5385]

pretty cool how you write backwards :D

[@marinstatlectures]

lol, a lot of people think that. i am actually behind a piece of glass writing, and the camera is on the other side...the image is then flipped/mirrored, so the writing appears the correct way. I'm actually right handed, but because of the mirror image, i appear left handed.

[@James-od9dm]

@@marinstatlectures this was my first question hahah NICE

[@navjotsingh2251]

You know it's about to go hardcore when they start writing backwards.

[@sb-hf7tw]

Plzzzz make some video on 01~one way anova, 02~two way anova without replication and 03~two way anova with replication i.e. equal number of observations per cell in R with proper real life examples..........🙏🙏🙏 Also on CRD, RBD and LSD in R.

[@marinstatlectures]

we likely won't make any videos on two-way ANOVA as it's not particularly useful in my opinion. you can get the same, and more, by just fitting a regression model that includes the two factors as x-variables. that is the way i teach it in my classes, and we really only present ANOVA as sort of a stepping-stone up to regression models.

[@jf_knows_nothing]

This guy is writing backwards and its blowing my mind. Even worse than the stats