Statistics 101: Single Sample Hypothesis t-test Concepts
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- Опубликовано: 8 мар 2013
- 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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The initial pep-talk made me NOT run away from statistics.
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
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
Wasn't expecting the pep talk. But it brightened my morning!
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.
t test
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.
These videos will remain forever green. God bless you Best Stat Prof on this side of eternity
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.
That pep talk was adorable and just what I needed. Great video, thank you! :)
I learned more from you in 10 minutes than I did from my Quantitative Methods instructors in 5 weeks. Thank you.
+Schmitty300 Teaching is an Art, my friend.
Brandon Folz is the best teacher i ever had for statistics, you rock harder than a brick!
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.
lol
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.
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.
you saved me from thesis tragedy, can't thank you enough. you make stats easy
Hi, i am an MBA student from india .it is very helpful.every stats student should watch this video.thank u ,god bless u.........
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.
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.
How did your test go?? I am preparing for the ASQ CQE and so far this is the most comprehensive material i have found!!!
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!!!
This is best on the entire RUclips platform on the statistics as it covers from very basics with excellent concepts and examples. Wow. Amazed your effort Professor Brandon
You are awesome. I was totally lost before this. God bless you and continue to do what you do!
Excellent! Thank you! I now follow each stat class up with these videos.
Thanks. I keep coming back to these series to refresh my knowledge
Thanks Brandon: your work from an educational perspective is amazing. Kudos to you!
Thank you so much. I'm already nervous for my statistic finals next week, but this helps a lot. Great explanation.
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!
You're a good teacher, thanks for being patient. Any good math teacher I've had doesn't rush through things.
thanks for the pep talk! U sooo neeeded it!
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!
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!
What a great series of tutorials. Yes, keep it coming.
Excellent! Thank you so much for the thorough explanation, Brandon! 👏
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. :)
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.
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!!!
I like the encouraging words at the start. Lord knows it's a struggle. Two more weeks. thanks.
Thank you, Brandon. I am struggling for my student life, it's so lucky to meet your video!
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.
This is a superb lecture. Thanks a lot Brandon. It helped me a lot. Looking forward to listen to Part 2 of your lecture.
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.
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.
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!!
Thanks Joshua! I am glad you find them helpful. Keep on learning; never stop. All the best! - B
Recording that pep talk to play to myself every morning. So inspired!
You are a good man for sharing this with us. Helps me soooo much. Thank you.
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!
Thank you! I love your pep talk.
i have been studying panicking and looking everywhere for my final. your the first to really help. thank you so much!
same likewise he helped me too, all the best for your paper.
Thank you for sharing, your video is one of the better ones I've seen.
I wish you had been my stats professor!! t-tests make sense now. Thank you!!!
Your teaching style is excellent! Thank you.
His lecture is a great. I have to listen time to time to refreshing myself.
These videos make more sense than my lecturer at university! Thank you!
I was about to drop my statistics class - thanks for saving the day!
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.
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.
Thanks for the video, this was very helpful especially the pep talk in the beginning of the video.
Best tutorial I have ever had.
Great video, congratulations! Awesome idea to compare the Z to the T distributions, made me really understand the concepts!
Amazing content. I am extremely grateful for giving ne the opportunity to learn for free and improve myself.
I am a PhD student who always needs refreshers for stats. Your videos are my #1 choice and have been, so thank you!!!!
Thank you Rebecca!
Rebecca Ryan wow that's pretty disappointing
Hey me too!! :)
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!
Gold.
Thank You for sharing your knowledge.
Great explanation, thanks!
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.
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!!
Thank you so much for posting your video!
thanks for the encouraging words! I am an ER nurse and Statistics class is the hardest class I have ever taken!!!:)
Thank you for the words of encouragement. The videos are really nice.
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.
Thanks for the introductory motivational speech.
Thank you very much Brandon for this video!
It is really helpful. Thank you very much indeed! Bye from Cambodia
...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.
Simple and exhaustive explanation
your motivational quote during the start of the video made my day
thanks
thanks a lot Brandon for the videos :)...they are really helpful!!
Pep talk was exactly what i needed
VERY GOOD STEP BY STEP TUTORIALS.THANKS
I love you fatherly teacher. God bless your heart, mind and soul. May you reach infinite wisdom. Simply thank you.
This clarification made me keen to do similar videos in the future.
Your videos are fantastic!
great videos and your skill as a teacher is unparalleled
thank u so much Brandon... u r a life saver
Very positive thanks for posting....Good for review too :)
4 years later, and that pep talk still helps
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.
Thank you Pedro! All the best in your studies. - B
I would have flunked if it hadn't been for your lectures. Thank you so much! :)
Thank you for another helpful video.
Good explanation . Attention to details are very good .:)
Excellent video, Thank You
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.
thanks.......Your lectures are of great help to learn the fundamentals.....
Very Good. Glad I watched it
Thanks for the reassuring words stranger :) Thanks for posting
the best one! very good! thank you！
SiCong Pan Thank you so much! Glad you find it helpful.
needed the pep talk for this cramming session haha!
thank you so much! this is really helpful
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
Thanks, last week was my first week of school and hated stats but this was really helpful 😄
Respected Sir, Very Good Presentation, Your pleasing lecturing make my study Simple