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Statistics 101: Single Sample Hypothesis t-test Concepts

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Statistics 101: Single Sample Hypothesis t-test - Part 1
Part 1: Conceptual Background
Part 2: Example Problems
In Part 1 of this video, we discuss the basics of single sample hypothesis testing when we do not know the population standard deviation and/or are using a small sample, n under 100. We also discuss how alpha and the t-distribution influence the location of the critical value(s).
For this type of test, we are comparing a sample mean to a hypothesized population mean. We examine the rejection region, nonrejection region, and the critical values that separate them. Finally, we learn to compute the t-statistic. Enjoy!
My playlist table of contents, Video Companion Guide PDF documents, and file downloads can be found on my website: www.bcfoltz.com

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8 мар 2013

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Комментарии : 228

@robertoaraya910 9 лет назад

The initial pep-talk made me NOT run away from statistics.

@BrandonFoltz 11 лет назад

Oh thank you! I am a learner first and foremost and just LOVE helping others grow and develop. You can do it just hang in there, we are all rallying for you! - B

@ssmediscan 10 лет назад

The beauty of a teacher is not in how much he/she teaches but how much the students learn.. You are indeed amazing. Thank you

@michaellewis4750 9 лет назад

Wasn't expecting the pep talk. But it brightened my morning!

@BrandonFoltz 9 лет назад

Michael Lewis haha thanks Michael! We all need a pep talk now and then and sometimes it's all we need to get motivated and feel positive. Glad you found the video helpful! All the best, B.

@tinayemutendera1331 7 лет назад

t test

@chryssokonofua1109 9 лет назад

Brandon, I ran away from my maths classes in the 70s and from college stats classes in the early 80s. You are helping me with what nobody could teach me then. You are a genius. And you deserve my commendation. May God keep you going stronger.

@kadel300 8 лет назад

I learned more from you in 10 minutes than I did from my Quantitative Methods instructors in 5 weeks. Thank you.

@igrewold 8 лет назад

+Schmitty300 Teaching is an Art, my friend.

@dariodemattiesreyes3788 10 лет назад

What a serious thing you are doing here. This is a really hight qualified lesson, the didactic details, the voice modulation, the video rhythm, the environmental music, etc, etc, etc. Excellent!!! Thanks for your work.

@wellyrose11 6 лет назад

That pep talk was adorable and just what I needed. Great video, thank you! :)

@BrandonFoltz 10 лет назад

Hi Ana! Thanks for your question. I cover your first question at around the 9:20 mark. There I talk about samples, sample sizes, and sigma known/unknown. As far as real life situations, I go through practice problems in Part 2.

@cammlounsbury4878 9 лет назад

There was a time when I would rather eat broken glass than do statistics. Thanks to you, I'd rather do stats! Seriously, these videos have been tremendously helpful.

@Margauxhoney 5 лет назад

lol

@gulf4yankee 5 лет назад

I am preparing to take the ASQ Black Belt Certification Test. I wish we had you for the instructor. Your instruction method and presentation far exceeds the efforts the instructor we had this past summer. Thanks to your video. I was able to relearn Hypothesis tests and actually understand it! What a break through. I use this stuff everyday on the job. Thank You.

@cynthiarojas4199 3 года назад

How did your test go?? I am preparing for the ASQ CQE and so far this is the most comprehensive material i have found!!!

@stellau2223 Год назад

These videos will remain forever green. God bless you Best Stat Prof on this side of eternity

@cleverclover7 4 года назад

Great video. Taken many stats courses, this is one of the best explanations of these concepts in a cohesive form I have seen. Thank you.

@ResaJoan 5 лет назад

THANK YOU! My professor is so unclear I was losing hope of understanding before the next assignment is due. Thank you for including the words of encouragement at the start! Thank you even more for your clear and thorough explanations throughout. I now feel confident that I will figure it all out eventually and do well in the class if I keep watching your videos and practicing. Thank you!!!

@rajanvk939 2 года назад

This is best on the entire RU-vid platform on the statistics as it covers from very basics with excellent concepts and examples. Wow. Amazed your effort Professor Brandon

@BrandonFoltz 11 лет назад

Thanks Rachel! Professors almost always have the best intentions but I know they have a zillion things to do. But I am very glad you find the videos helpful. May we all continue to learn and grow! All the very best, B.

@Nxrp015 3 года назад

These videos are FANTASTIC!!! I have taken stats courses in my undergrad and grad school but this is the first time I am truly understanding it. So thanks a lot!

@davidshakil1985 9 лет назад

I just want to let you know that your videos are fantastic and very helpful. I am taking Psych Stats and I was struggling with some basic concepts. Your video just answered all my questions. Keep it up!

@sjackson3806 9 лет назад

You are awesome. I was totally lost before this. God bless you and continue to do what you do!

@joshmecham 10 лет назад

I enjoy watching your videos; they are great for when I need help in my AP Statistics course. I also enjoy how you teach. Keep up the great work!!

@BrandonFoltz 10 лет назад

Thanks Joshua! I am glad you find them helpful. Keep on learning; never stop. All the best! - B

@OnlyTeaGuru 8 лет назад

You're a good teacher, thanks for being patient. Any good math teacher I've had doesn't rush through things.

@BrandonFoltz 11 лет назад

You can do it! Have faith in your abilities and work-ethic. Coming back to a Ph.D. program after time away is an awesome credit to your desire to realize your self. It is all going to work out in the end my friend. Pay it forward when you have the chance. All the very best, B.

@Katex1234x 10 лет назад

your videos are making freak out a little less about my upcoming stats final.... something tells me ill be seeing these in my sleep over the next 2 weeks. thanks for doing what you do!!!

@huriatariq2533 6 лет назад

Thank you so much!! Your videos are helping me so much and I just wish I had found them a bit sooner then I wouldnt have had such a bad time with my stats course the entire semester. You are a great and talented teacher!! Truly!

@ryanweber7826 2 года назад

I have watched several of your videos. I am in intro to statistics and have a hard time figuring out t test and what it does and just the basic meaning. You have been very helpful. Thank you very much!

@syandanreddy5534 4 года назад

I am happy that there are people like you in this world who make things much easier and intuitive sir. I wish i was your student at some point in my life. Thank You so much for what you have been doing to the community.

@mishiboo44 5 лет назад

I like the encouraging words at the start. Lord knows it's a struggle. Two more weeks. thanks.

@Ward2640 10 лет назад

Brandon Folz is the best teacher i ever had for statistics, you rock harder than a brick!

@jainy1707 7 лет назад

you saved me from thesis tragedy, can't thank you enough. you make stats easy

@chenwei7 5 лет назад

Thank you, Brandon. I am struggling for my student life, it's so lucky to meet your video!

@TimHaston 10 лет назад

Thank you for your carefully created video. I am currently writing my master's thesis, and need to include a T-Test. Being that I never took probability, this was an incredible source of information. I haven't got all of the terms committed to memory, but I certainly understand what is going on with this now.

@sergior.m.5694 4 года назад

Thanks. I keep coming back to these series to refresh my knowledge

@sallyheifer9684 7 лет назад

I don't know if you watch Expedition Unknown, but your voice and accent remind me of the voice and accent of the host. Thank you for the encouraging words! It has made this long study session a little easier. :)

@timbruse 10 лет назад

Excellent! Thank you! I now follow each stat class up with these videos.

@Chatwaheart 7 лет назад

i have been studying panicking and looking everywhere for my final. your the first to really help. thank you so much!

@kibavlood5826 7 лет назад

same likewise he helped me too, all the best for your paper.

@DonnaKjellander 8 лет назад

Thank you, this has to be the best video and explanations I have seen so far. Great explanations! i will be watching more of your videos.

@kellijackson-farris5165 10 лет назад

Thank you so very much, I am studying for my Basic Statistics final at this time. I have gained more understanding watch just one of your videos than I have during the entire class. Thank you for taking the time to explain the concepts. I feel confident that I will pass the exam this week. Bless you!

@Loewsey 10 лет назад

Thank you so much. I'm already nervous for my statistic finals next week, but this helps a lot. Great explanation.

@BrandonFoltz 11 лет назад

Oh thank you so much for your kind words! However YOU are getting yourself through statistics. :) Making the effort to learn and improve and the desire to do well are what is getting you through. And that is all you. Thanks for sharing with your classmates...that is wonderful! All the best, B.

@tyler20082010 10 лет назад

Thanks for making and sharing these great videos. They are so clear. I like the way you encourage people to keep learning. I also like it that you will go over the previously discussed topics before starting the new ones. Greatly appreciate your efforts.

@joseferreirapinto9523 4 года назад

Thanks Brandon: your work from an educational perspective is amazing. Kudos to you!

@peterp6016 10 лет назад

You are a good man for sharing this with us. Helps me soooo much. Thank you.

@cilibearn1814 8 лет назад

I was about to drop my statistics class - thanks for saving the day!

@hannahchapman6640 8 лет назад

Recording that pep talk to play to myself every morning. So inspired!

@jenroberts7267 2 года назад

Excellent! Thank you so much for the thorough explanation, Brandon! 👏

@samuelswiswa3553 10 лет назад

This is a superb lecture. Thanks a lot Brandon. It helped me a lot. Looking forward to listen to Part 2 of your lecture.

@ernestoperez731 9 лет назад

What a great series of tutorials. Yes, keep it coming.

@somcana 5 лет назад

I love you fatherly teacher. God bless your heart, mind and soul. May you reach infinite wisdom. Simply thank you.

@ATWKate 9 лет назад

Your teaching style is excellent! Thank you.

@badoiuecristian 4 года назад

Amazing content. I am extremely grateful for giving ne the opportunity to learn for free and improve myself.

@marycurtis2917 10 лет назад

This is so great it will really help me with my sats class. This is giving me the faith that I will make it. Thank so Much Brandon Foltz. Thank You!!

@lpsglitterpaws8536 4 года назад

This is my last chapter in Elementary Statistics online. I don’t a teacher that posts lectures or anything, so I’m basically teaching myself through Pearson. If it weren’t for gifted teachers like you, I would not be able to get through it. I am forever grateful to you!

@angelreyes4631 2 года назад

@YoungPrettyThings 11 лет назад

These videos make more sense than my lecturer at university! Thank you!

@icrad111 8 лет назад

thanks for the encouraging words! I am an ER nurse and Statistics class is the hardest class I have ever taken!!!:)

@teciagreen7718 6 лет назад

thanks for the pep talk! U sooo neeeded it!

@ankitanawalakha1687 10 лет назад

I would have flunked if it hadn't been for your lectures. Thank you so much! :)

@geyoulkim1291 10 лет назад

His lecture is a great. I have to listen time to time to refreshing myself.

@pallabchakraborty3821 9 лет назад

Hi, i am an MBA student from india .it is very helpful.every stats student should watch this video.thank u ,god bless u.........

@MikeSparksTn 9 лет назад

Thank you for sharing, your video is one of the better ones I've seen.

@fwlanger 8 лет назад

Great video, congratulations! Awesome idea to compare the Z to the T distributions, made me really understand the concepts!

@BrandonFoltz 11 лет назад

Why thank you...but YOU are the awesome one! You have committed to taking the journey of learning and growing and improving. I am just the map-maker. :) All the best, B.

@RQUIGL13able 7 лет назад

Best tutorial I have ever had.

@BrandonFoltz 11 лет назад

It all depends on the sample size. At n=100 the z- and t- are almost the same. The t- just accounts for the limits of sampling as n decreases. It's not that we "want" a less representative sample, it's that it just comes with the territory of sampling. With small samples, the interval has to be wider for us to be 95% confident that interval contains the "true" population mean.

@lnghngong2494 9 лет назад

It is really helpful. Thank you very much indeed! Bye from Cambodia

@walirahman8014 9 лет назад

Thanks for the video, this was very helpful especially the pep talk in the beginning of the video.

@cclayborne7 11 лет назад

I wish you had been my stats professor!! t-tests make sense now. Thank you!!!

@TheShekharaditya03 8 лет назад

your motivational quote during the start of the video made my day thanks

@stinayoo 10 лет назад

Thanks for the introductory motivational speech.

@paulernat 8 лет назад

Good explanation . Attention to details are very good .:)

@rebeccaryan1779 7 лет назад

I am a PhD student who always needs refreshers for stats. Your videos are my #1 choice and have been, so thank you!!!!

@BrandonFoltz 7 лет назад

Thank you Rebecca!

@erikibarra4530 6 лет назад

Rebecca Ryan wow that's pretty disappointing

@mmmommm237 6 лет назад

Hey me too!! :)

@SawanSalhotra15 4 года назад

Simple and exhaustive explanation

@8NickzB 8 лет назад

Pep talk was exactly what i needed

@insilicium 5 лет назад

Thanks for the video. I understood the contents, and you speak well and clear, understandable even for people whose English is not their native language. I would ask you a video about the Levene test.

@rhythmmusica4636 10 лет назад

sir your explanation is great.it helped me a lot.please give a complete lecture on theory of attributes

@ImtithalSaeed 4 года назад

This clarification made me keen to do similar videos in the future.

@fransquash 9 лет назад

VERY GOOD STEP BY STEP TUTORIALS.THANKS

@ultra.violet5066 8 лет назад

great videos and your skill as a teacher is unparalleled

@Laohouzi100 10 лет назад

Thank you so much for posting your video!

@michaelbries5344 8 лет назад

needed the pep talk for this cramming session haha!

@BrandonFoltz 11 лет назад

...and that is because in the t-distribution there is more variability or uncertainty due to the sample size being smaller than the population (which it is by definition). So the endpoints (t-values) move outward to account for this variability.

@drjavaidahmadd 10 лет назад

thanks.......Your lectures are of great help to learn the fundamentals.....

@JSTaylor556 5 лет назад

4 years later, and that pep talk still helps

6 лет назад

Great explanation, thanks!

@vivirose6170 9 лет назад

Thank you so very much. Your warm style is very kind. Stats is like going to the doctor with a mysterious symptom... we need someone to hold our hand. And if we have nobody, maybe a nurse will do :-). Thank you!!

@chinmayeejoshi4592 7 лет назад

Thank you! I love your pep talk.

@solaawodiya7360 8 лет назад

Very Good. Glad I watched it

@marciascott2424 9 лет назад

Thank you for the words of encouragement. The videos are really nice.

@whiteorchid1957 8 лет назад

Thank you for another helpful video.

@k8reed 9 лет назад

Your videos are fantastic!

@samdavepollard 7 лет назад

Gold. Thank You for sharing your knowledge.

@rynoweston 9 лет назад

Thanks for your videos dude. These really help to clarify some of the stuff that I've been learning. You teach the fundamentals so well that it helps me to understand other problems much better.

@alimahmoud4489 8 лет назад

Thanks is not enough to express my gratitudes to your effort. I would to see more videos for econometrics also... Your style in explanations is amazing and fits all kinds of people,,,, Looking forward to hear new topics... Than you +Brandon Foltz