Statistical Tests: Choosing which statistical test to use

Seven different statistical tests and a process by which you can decide which to use.
See creativemaths.net/videos/ for all of Dr Nic's videos organised by topic.
The tests are:
Test for a mean,
test for a proportion,
difference of proportions,
difference of two means - independent samples,
difference of two means - paired,
chi-squared test for independence and
regression.
This video draws together videos about Helen, her brother, Luke and the choconutties.
There is a sequel to give more practice choosing and illustrations of the different types of test with hypotheses. • Choosing which statist...
See creativemaths.net/videos/ for all of Dr Nic's videos organised by topic.
Here are links to the videos mentioned.
Test for a mean: • Hypothesis test (t-tes...
Difference of two means, independent samples: • Hypothesis testing: st...
Difference of two means, paired samples: Coming soon
Chi Sq test: • Chi-squared test: (2) ...
Regression: • Scatterplots in Excel,...
#DrNicStats #Statistics

[@Kikitheremixed]

Dr nic, in 2022, your videos are still extremely helpful. So clear and concise. Thank you for this gift.

[@DrNic]

Glad you like them! Who'd have thought they would still be going strong after ten years!

[@DrNic]

As you can see from other questions, it is quite usual for the question to be vague. Only with experience do you work out what details are needed. It looks as if I need to do a video on non-parametric tests, which is what most of those are.

[@DrNic]

Thank you. I did put a lot of thought into devising that diagram.

[@winvictorywin5612]

Very interesting presentation👏👏 I am having airborne dust concentrations data for >1 micron size, >3 micron, >5 micron and >10 micron size. (> means greater than) These data was taken before and during dust producing work in field study. N=5 How can i compare these before and during operations data ? It seems that there is relative percent variation in dust concentrations in atmosphere between before and during operation data. (Taking >1micron as 100 %) Before operation: The relative percent variation of concentration with different particle size is as below. For example Concentration of >1 micron size particle is 100%. >3 micron: 80% >5 micron : 60% >10 micron: 40%. During operation: Concentration of >1 micron size particle is 100%. >3 micron: 90% >5 micron : 80% >10 micron: 70%. It seems that >10 micron particle share is increased due to that machine operation...? Which test is suitable for analysing these type similar data for discussion ? How to use statistics? Any comparison among these concentrations of different particle sizes ? thank u.

[@irsyadfirdaus2636]

Thank dr, you help a lot

[@bhiks1377]

Helpful Diagram 👏

[@anikanashatmatin6860]

Do u have any email id where u personally assist for PhD scholar? Kindly share if so

[@DrNic]

@@anikanashatmatin6860 Sorry - I don't have time for individual tuition/consultation at present.

[@Andrei-ld3gw]

Out of all the statistics channels and videos, this by far is the most helpful; very simple and concise, didnt use any convoluted words to impress audience but precisely to help understand

[@Tetracarbon]

I love love love your Venn diagram approach!!! Thank you so much. I have read quite a few econometric textbooks and they still don't make it anywhere quite as clear as this. Thank you!

[@briansmith1775]

Thank you so much. This is a real life saver. Believe me. Among thousands of videos yours are straight to the point.

[@susanhaas5681]

This is not only EXTREMELY helpful but hilarious! So fun to watch!

[@bupekabamba6017]

Hehehehe the notes she was leaving to make sure you pause the video are just hilarious.

[@williamhenryharrison9thpre139]

Korni nyo

[@tiffam2938]

Your videos, in my opinion, have some of the best explanations of basic statistics. Thank you.

[@kiranmehr4118]

THANK YOU, MY GOD you saved me! Love Helen and her attitude haha! Thank you again :).

[@steeltalon2011]

Impressive. Your lock step approach makes it possible to analyze and conclude which test to use. I've been looking for this for a looooooong time. Thanks.

[@DrNic]

It is good to draw two boxplots and/or histograms as well, as that gives an indication of the spread of the two samples as well. Graphs are an essential part of any statistical analysis, and will have to be the subject of another video!

[@DrNic]

Happy to hear it.

[@SamA-vc4uy]

Good, informational video and thank you for including closed captions!

[@christianprofessional]

Thank you so much. This would have helped me not be so far behind in my introduction to Statistics course. I am going to pass this video to my former professor.

[@HarpreetSingh-ke2zk]

We used to learn through animations. Excellent summarized presentation. Helen bringing statistical queries as an example.

[@DrMichaelMoroney]

This is a useful video for students that are still at a point where they are unsure which of many statistical tests they should use.

[@DrNic]

Dr Michael Moroney Thanks. I think it is also helpful in that it shows some of the relationships between the different types of tests in a way that a flow diagram doesn't.

[@MianndaYou]

Wow, you channel is amazing! Thank you for making something that I thought I will never understand so easy! Three hours of lecture from my professor vs 9 minute video from you.

[@DrNic]

Hi Anna Thanks for your endorsement. It may be that the three hour lecture gave you useful stuff, and the video helped organise it. Teaching statistics is very difficult, which makes learning it harder than it might need to be. Keep watching!

[@sohailasghar8471]

Various topics are now very easy to understand after listening ur lectures. Keep it up. You are spreading the wisdom

[@nachiketjangam4343]

just 2 mins in the video and It has so much clarity!, it means a lot of efforts were put by you to summarize this. Thank you for making our lives easier.!

[@DrNic]

Thanks - I really have put a lot of thought in, so it is nice to be appreciated.

[@DrNic]

A bit depends on your sample size. You could use Spearman correlation or Kendall's tau.

thank you soon much :) it was very clear and systematic, helped a lot!

[@marcoglara2012]

I love how easy to understand and logical this was. The visual displays helped my understanding immensely. I wish all statistics teachers were this good at conveying information

[@DrNic]

Thanks - I thought really hard about this to make it clear.

[@draughtlab6837]

This is hands down the most useful graphic I've seen. Thank you, Dr. Nic

[@DrNic]

Wow, thanks! It took quite a bit of thinking to come up with it.

[@julietoffojua4229]

Nice one. Technology in action. I will continue to practice. Thanks.

[@hend1243]

One of the most useful vidios.. Thanks a lot

[@tahirshah6979]

The very precise and meaningful. This is excellent Dr.

[@sarawerkneh2817]

Amazing summary and perfect example!

[@aaronschrock8579]

i cant believe how helpful this was

[@DrNic]

Thanks - I thought really hard about how to present this in a more holistic way than the usual flowchart approach, so I am happy it is helpful.

[@philboy794]

Most useful diagram i have found and its so simple. If i found this earlier I wouldn't have had such are hard time following along in class!!!!

[@DrNic]

That is great to hear. Usually textbooks use a flow chart approach, but I wanted to make one that held everything together so you can get an overview. It is my own invention, so I'm happy you find it helpful.

[@jbrowsingj]

Excellent video! Very powerful explanation and unexpectedly hilarious visuals. Thank you!

[@paularunslondon]

I've not finished the video yet, but it's been really helpful so far! Breaking it down into those questions has helped me figure out what I'm looking for.

[@DrNic]

So glad to hear it! Most text books etc use a flow diagram method, but I made up this way of displaying it as it shows the relationships between the methods as well.

[@rubibojorquez3216]

Well explained and fun. Thanks

[@titatita3896]

I'm studying for my comprehensive exam..and found this very useful..thanks. I don't mind the accent at all...

[@DrNic]

Thanks. The thing is, if you use a computer package, it uses the applicable statistic and converts the answer to a p-value. I'll put that in my list of videos to make! Working on time series analysis and reporting at present.

[@saiyan7010]

my bio stat teacher just read thro the power point in mono tone voice and didn't give introduction on any new hypothesis test we learned. i was struggling when reading text book (i am not good at learning from reading text book). ur video is very helpful and concise. it really helped me to understand the purpose of each test a lot better and make statistic more enjoyable. Thank you very much Dr Nic.

[@lakshitdagar]

Gem of a video!!

[@iyer5]

the way u have editted ur videos is simply appreciable!!!! loved dat statement, " If you have any kind of self esteem!! Pause!! " hahahaha nyc 1 truly admirable

[@sonyamunoz33]

Thank you very much, you have done a great job with simplifying what test to choose.

[@DrNic]

Thanks. I did a lot of thinking for this.

[@naithal2901]

Thank you for such a great video! Really benefited from the content but also the methodical structure and system that you taught the concept through.

[@DrNic]

Glad you enjoyed it! I put a lot of work into the structure so it is good to be appreciated

[@DrNic]

Seeing there were two independent samples, I would recommend difference of two means, independent samples. If the same people were measured before and after, then it would be paired difference of two means.

[@thesolvit7407]

I don't know which one is correct in analyzing the difference between the pretest and posttest if the number of participants in my control group is 15 and control group is also 15, defying the criteria of using parametric test. What should I do? Please help♥️😭

[@tasnimkeddo5548]

Now we are in coronavirus year

[@nush4u]

Thank you.. very helpful :)

[@christophersneed5586]

Best explanation yet! Thank you for posting this. Wow! I chose the correct one almost every time!

[@DrNic]

Thanks and well done. There is another practice video as well.

[@geervanim.2902]

Thank you so much for this video. It made some of my concepts clear.

[@mfgranja]

From Bogotá-Colombia Thank you :-), this is a really good work, you inspire us as teachers-- :-)

[@ciarademp]

wow - i just understood my statistics module that happened in 2009 for the first time - thank you!

[@DrNic]

Thanks. I put a lot of thought into that video. We are just about ready with a web version now too, in case they don't have an iPad or iPhone.

[@soldirix2666]

I Love the art used in these videos. Very nice work!

[@DrNic]

Thanks - the artist is an anime fan, as I'm sure you have guessed.

[@millybee5499]

Wow that Eureka moment!!!! I finally get it 😂😂😂😂 thank you so much!!! I can finish my dissertation in peace now! This is so simple and straightforward 👍

[@DrNic]

That is great news.

[@CrazyBeautifulLife58]

Partially helpful, but a bit confused about what the names of tests translate as - I think they're the same concepts as I've learnt in my lectures, but they don't have exactly the same names

[@ansariyasmin7474]

Thank you for clarification on the tools

[@krishnadesai79]

A nice and innovative way to explain... Thank you so much.

[@nurul1495]

Pause if you care your education😂😂anyway good video. Thanks sm😆

[@firebirdies]

all humans should watch this at some point in their lives

[@dramaadictisback4986]

Thank you so much for this! You didn’t just teach the content but also how to navigate and use what we learnt. Your videos have been exceptionally helpful. God bless you ❤

[@DrNic]

So happy to hear that.

[@abiyotlemagamtessa2572]

I found it really help full, I am attending my MPH but can really Understand my instructor in the class but after getting this video wow, I understand it thank you so much.

[@abigailyeboah2853]

Very helpful video. Helen's got an attitude though. Hilarious.

[@DrNic]

Thanks Abigail. She makes me laugh. My son, who was the editor for many of these videos, has a quirky sense of humour.

[@caldeh]

I want some choconutties!!!!

[@DrNic]

Me too.

[@ozashweta2037]

Thank you. Very nice explanation with example.

[@rpkumawat4585]

Excellent summarised presentation.

[@TheLadiesman217137]

Lol, didnt even pause... haha.. *confused

[@dieutran9066]

You save my life, save my time. Loads of kisses to you :* :* :*

[@SHANEDABIRDMAN2]

Diệu Trần hhhh

[@shishirmahmood1766]

This is an excellent video to understand TYPES of test. Hats off!!

[@DrNic]

Thank you very much!

[@Rohadjakmeg1]

Thank you Michael, I just started learning statistics for fun and for better understandings and I couldnt even think of better video than this! Incredibly good starting point, and I think I will study all of your choclate adventures ^^ :)

[@KamalAsasi]

Helen is always angry when she asks people to answer her questions. She should change her attitude otherwise she can not find the real answers from the respondents and therefore, the results are not valid.

[@xrc7445]

You wouldn't think she has an attidute if she was a man. Anything to bash a woman entrepreneur even if she's a cartoon. For a man, this behaviour would go un-noticed and, mostly, un-commented..

[@MNSTRMDVNCS]

Such a funny remark to teach about response bias.

[@KamalAsasi]

Guys, plz take it easy and don't consider my comment as sexist. I just try to explain that we should not force someone to answer our questions as it can effect they response. I apology if I offended someone. All the best.

[@mobinansarivlog9126]

@@xrc7445 it's her choice

[@baul6843]

@@xrc7445 Sure, make everything about gender again. No, the situation would not be judged differently if she was a man and no one is bashing female entrepreneurs. It's a cartoon made for education. Leave your stupid world views out of here.

[@Adrian-ly7by]

is that brienne from game of thrones?

[@deepsirathore4339]

Thank you for explaining with clarity about the various statistical tests.

[@DrNic]

You are welcome!

[@radhikasrinivasa3068]

I have developed a lot of respect and love for statistics! thanks to you !!

[@DrNic]

That is lovely to hear, Radhika. Understanding statistics is such an important skill for being fully informed. Glad I could be of help.

[@radhikasrinivasa3068]

@@DrNic thrilled to get a reply from you ma'am

[@PuneetMehra]

Your accent is totally non comprehensible. pickets? choco latte? tist?

[@veggiepants2707]

^ spoken like a true aussie

[@globexbeautysolutions7125]

New Zealand accent.

[@whoeverwhateverany1]

I beg to differ. it is comprehensible, it's just probably an accent you are not used to. oh and it's choco nutties by the way. There are many different accents so it wouldn't harm to learn to get used to some new one once in a while. Wouldn't it be boring if everyone spoke in the exact same way?

[@WorldoftheNebulous]

yo I blew on my screen because I thought your profile pic was a piece of hair hah got me

[@1307sammiemc]

How good is this: Doing an online degree - without this type of resource would be totally lost. Thank you :)

[@SMHLK218]

Thank you. Excellent video

[@ravigadani]

This is an insanely helpful video. The topic has been clearly explained and the examples are on spot. Thank you so much.

[@DrNic]

You're very welcome!

[@xrc7445]

Very helpful video, thank you!

[@nehalchavda1407]

Thank you for the detailed explanation and making the topic clear to us!

[@DrNic]

You're very welcome!

[@TheJazzzilla]

Brilliant video. Loved the sarcastic comments... it got me to pause. Great stuff Dr Nic

[@DrNic]

Glad you enjoyed it. The comments from my editor who is also my son. He's pretty funny

[@peteryu7366]

very helpful explanation, thx for sharing

[@padiahiral]

Thank you for enlightening us about various statistical tests.

[@DrNic]

Glad it was helpful

[@migishaboyd]

I guess that means i'm doing regression analysis. Tons of help, here, Dr. Nic! God bless you!

[@DrNic]

Thank you for that. Good luck! I have a series about multiple regression that is also helpful for linear regression.

[@drbhavin8387]

explicit explanation, Thanks a lot !!!

[@dishatrivedi3947]

Thank you for giving this useful information

[@desaipriyanshi1997]

some of the best explanation among others. it's very helpful. thank you.

[@parambuch4679]

Thank you for explaining such complex concepts of choosing statistical test in easiest manner. Really helpful.

[@DrNic]

Glad it was useful. It took quite a lot of thinking to come up with that format

[@veerendrasinghnagoria6362]

Your video was both simple and effective. It nicely presented the data, samples, and the purpose of analysis, helping in the selection of the appropriate statistical test. Thank you!

[@DrNic]

Glad you enjoyed it!

[@raghuveerjadeja1026]

impressive, superb session

[@surekhaadki8423]

Excellent Job. It really helped me a lot. Thank you for the most informative video.

[@DavidMbale]

Thank you this has helped with my assignment

[@staceychristian9181]

Thank you for explanation.

[@duggi1810]

Very well done and kept simple to understand !!

[@bogstav]

Great and very helpful video. Thanks for sharing!

[@accountantsohanakhanpathan7110]

Thank you sir for expanding

[@Felicia-126]

Wonderful video Dr Nic!

[@DrNic]

thanks

[@DrNic]

You should watch another of our videos about types of data, nominal, ordinal, interval/ratio so you can get a better idea of what kind of data this is. As the video shows, some people would say the data is ordinal, and you have to use a non-parametric measure. Others would say that it is interval, and you can use a t-test. I would do both. They will almost certainly give the same answer with regard to the original question, though the p-values may differ a little.

[@bhartiprajapat8885]

Thank you for guiding related to Statistical tests

[@DrNic]

Most welcome

[@jaimidave1514]

Thank you for explaining

[@wfhdick]

These vids would have been so great when I did stats and epi many years ago. What a great resource.

[@DrNic]

Thanks

[@zeelupatel2933]

Excellent video. I learned so much. Thank you.

[@rituparnaprakritichatterje9596]

Thank you so much for the session.

[@DrNic]

So glad it was helpful to you. I put a lot of thought into it.

[@namechosen1]

Oh thank you so much for replying and helping! Much appreciated :)

[@av11105]

Thank you for explaination regarding various tests

[@shwetathakar1369]

Wonderful idea for brainstorming... that she let us think first and then give answer.

[@DrNic]

I'm glad you like it. There is a follow-on video that gives you some more examples too. kzbin.info/www/bejne/hn23i6WHqZVkiZY

[@jigarjoshi6708]

Amazing interactive video.. tests well explained & Simplified..