Statistics 101: Null and Alternative Hypotheses 

Start @ 13.31, if You have already watched the first video from this playlist.

Thank you so much! Truly though...you had it in you the entire time. Sometimes we just need to see things in a different way. I just try to light it from a new angle. :) My mother has been a nurse for 32 years, so I commend you for helping those who are most vulnerable. Hang in there. People need you,

Stopping the video 10 minutes in to say I understand more in 10 minutes from your lecture than my current professor and a text book has taught me in weeks. thanks man,

You are the epitome of an educator/teacher. I love your starting quotes as they sort of motivate me and put me into the right gear for the lesson to come. Your pace, your content and your delivery in general sets you apart from every teacher I've ever come across. And the weird part is I'm never left with any doubts or queries after your lesson. You answer my query the moment I think of it like you're telepathic. And the best part is although I can't see you or communicate in real time while your teaching, you do a waaay better job that face to face teachers.

Thank you so much for the motivational speech in the beginning!! :) This helped a lot !

I love this guy, so fricken positive. Thanks for the video.

Hi ! I'm not sure if you'll see this but your videos are seriously impacting us students in more ways than you can imagine. It's uplifting, encouraging and it conveys the content very well. You explain really well in terms of the concepts and what not and seriously thank you SO much. God bless you 😭

the positive message in the beginning is really something no educator has... its really unique and i like it

just one thing to say.. thank you for existing!! we students with crapy statistical teachers would forever be grateful!

I'm a clinical pharmacist studying for my BCPS and your videos are a God send. Thank you!!

Mr. Foltz A couple of years ago I decided to complete my doctorate. Ím 51 years old. Today I was revising my you tube channel due to the fact of Covid-19 quarantine and find your videos. If it wasn’t for you I will not be any near to complete my stats courses. Thank you, thank you and thank you on behave of all the people depending of that achievement. Keep the good fight.

I have been reviewing your videos for my final this afternoon, and they have helped me tremendously. I know My Professor is trying his hardest and can only do so much during my class, but the clarity you have provided for me is bar none. Thank you for these videos!

Finally. A teacher who really knows how to teach this material. The textbook I'm using for grad school stinks, and most of the other videos are terrible. Thank you Mr. Foltz for breaking this material down to its bare bones and making it easy to understand.

I love the motivational speech at the beginning of every video. You have kept me from freaking out and dropping my class. I love your real world examples. They help me understand.

Brandon as a student I cannot tell you how much I appreciate these videos. You really take your time to make sure we understand the material thank you so much for doing what you do!

Excellent, very clear and perfect for beginners or for struggling students. His practical examples makes you wonder why all intro stats courses are not taught this way. I'm working my way through all of his tutorials. I haven't studied or used stats in over 35 years. This is a great way to get up to snuff.

And...there it is. More than halfway through the third video. All this time, I just wanted to know what "null" meant in words, and started to think that maybe it was an abstraction or " je ne sais quoi" . Saying that "null" means nothing new or different the first time the term was introduced would have made everything afterward so much clearer. Please know that I just discovered and love your videos. I am a month into a research methods course, and none of the text books, presentations or other materials have done this either. No wonder students are confused!

You are the BEST teacher I will ever know! THANK YOU SO MUCH FOR MAKING THIS A LOT EASIER. I cannot thank you enough! I've been struggling understanding these concepts for quiet a while now and NO ONE has done a better job than you. I honestly wish you're my statistics professor, then I would say the money I'm paying to go to CAL POLY POMONA is worth it. Now, I don't know if it's the stress that this professor is causing but I got to the point of crying for desperate help. My point here is to THANK YOU for the best explanation on this subject. I am definitely recommending you to my fellow classmates and family! Thank you, and I'll "see" you in your other videos, because I'm sure I'll be learning the rest of the course with you! :)

From all the RU-vid help video's I've watched during my studies your's are my favourite. It is wonderful that you preface them with encourage me acknowledging that some students might be struggling. Thanks!

Hello Siddartha! Actually if you look around that time what I say is that Ho will always contain the equal sign in some form, either equal to, less than or equal to, or greater than or equal to. With just = it is a two-tailed test, the others are one-tailed tests. As you can see, all three of them do contain the = sign. Let me know if you have any other questions. - B

This has been awesome thus far! It was recommend to me to use RU-vid videos to learn what I was having difficulty with in class and I'm glad I listened. You're a great teacher!

so helpful. online stats courses arent hands on enough for me. this helps to fill that void. thank you

One of my null hypothesis : Brandon videos are the best source for understanding statistics concepts

I am a MS Statistics student and I use your videos to revise my course material before an exam. Your videos have been very helpful. I just have one observation. In each subsequent video, you repeat a lot of information from the previous video (I know it is useful for a novice). For eg., in this video, the 1st 10 minutes are a repeat of information from the previous video.

I loved your lecture on Null and Alternative Hypotheses. You explained it so much simpler. I will definitely continue watching all your videos, since I'm getting ready for Final exam on July 19,2014. Lilly

Amazing! I plan to go through all your videos on Statistics. I have shared with 5 other colleagues.

Thank you for getting me through my semester of statistics! Please keep making videos - we need more teachers like you.

After a 22 minute video, I think I may finally understand null and alternative hypothesis. This helps so much. I will watch your other stat videos now!

Some of the most well thought out and helpful explanations of difficult subjects that I've come across. Great job! Problem though: it appears that some of your videos, like z tests, etc., were developed in a sequence wherein you state that having seen a previous video might be helpful to understanding the present video. Unfortunately, there is nothing in the titles of the videos to distinguish that sequence. One has to get several minutes into a video only to discover that having watched another one first would help. The viewer then has to search around trying to locate that video. Having videos identified in their subject line/title by their place in a sequence, if one exists, would be most helpful. Otherwise, terrific learning experience! Thanks!

Great job! Have an MBA from a decade plus ago. Work in stat field, but this was a great refresher. Thank you.

Awesome! I am sure your teacher means well. I am glad you found it helpful. Best of luck and keep learning! - B

Oh thank you very much. :) I am so glad you find the video helpful! I am sure your teacher means well. Sometimes I don't teach so well either! Hehe. Thank you for inspiring me to continue this work. All the very best, B.

Yes, I got it!!! Thank you, the time you spend to explain it was perfect. I appreciate your videos so much..

Thank you Brandon Foltz for this wonderful video on Null and Alternative Hypotheses. You have explained it in a beautiful way that I understood it even though I do not have statistics background.

Mr. Foltz. Thank you so much for making this concept(Null Hypothesis) clear and easy to understand. I read and reread the same chapter in my Greenbelt(LSS) training module 5 times and was still lost until I saw this video. Thanks for making learning interesting and and fun to do. I will be viewing your other videos on the Normal distribution as well.

Blessing in disguise.. Thanks a lot for all the time and selfless effort you are putting in to help the poor souls like us... As Dixyfun said - If only you were our prof.. but with these videos you are giving us the next best alternative..

Thank you, Brandon, your presentations are fun to follow, the manner you explain these statistical principles is clear and simplyfied enough to make it easy to understand.

This video is simply fantastic for the beginners. The practical implications discussed makes it more relevant and interesting. Hats off to you. Keep on doing the great work

I love your inspiring words before the lessons. I'm going to start saying stuff like that more often...Good work on the videos!!!

Thanks 15:30 what is considered a null hypothesis and what it considered an alternative hypothesis Null hypothesis is testing a status quo/assumption. We can only reject this assumption or fail to reject it, but we can’t prove it. Null hypothesis example: water bottles are 355mL full If we reject it then there is evidence that they are not 355, if we fail to reject then no evidence

You have been helping me pass my Statistical research class. Love your video. Thank you

Hello and thank you for your comment! Did you happen to see Part 2 of the video? In Part 2 I walk through three examples with explanations and interpretations, However if you watch Part 2 and still need other examples, please let me know and I will see what I can do. All the best, B.

Always curious to see what will be quoted at the beginning of the next video. Thanks a lot for sharing your good tutorials. I have been engaged and learned a lot.

Your practical example of null hypothesis is really awesome!

its really a great video!.......teaching style is fantastic.....any person can understand Statistics with the help of your great videos

oh, I am sharing with college buddies. Gosh, books were written to confuse the hell out of us. Watching your vids have simplified matters

I love your videos, they are simple and straight to the point, beside your motivational quotes and speech in the beginning... Thank you!

I'm doing further maths and struggled on this, and its actually pretty easy, you mate are 100 times better than my maths teacher, I might actually get an a on this exam, thank you so much!!

I am in a quantitative analysis class and have been struggling since week one. At least this is something I can understand better than the instructor who does not seem to understand we are there to learn but not that we already understand it.

Great stuff Brandon, very clear and straitghfoward!

Thank you! This is the first time i've found such thorough explanation and it really helps!

Very clear explanation of concepts.Thanks a lot Brandon. You are Great

i used it my math class,,please continue your works it's awesome!!

Hello! YES! You are correct. Ho less than / equal to 255, Ha greater than 255. Just be careful how the conclusion is stated. Even if you reject Ho, that does not "prove" that Ha is "true." Doing so involves the risk of Type I error. That rejection data point may just be in the 5% or whatever that we expect to fall outside the rejection region for Ho. If you have any other questions let me know! - B

@JohnnyGrateful Thank you so much for your kind words. Trust me viewers like yourself inspire me more than you could ever know so the kudos goes to you! Always pay it forward right? All the best, B.

I'm pretty confident that I can eek out that C- with extra credit and vigilance in turning in all the assignments. It's just my test scores are really bogging me down and since the tests are not open notes. I'm struggling to do well on any of them. Thank you for all the help though ^__^ your videos have been great.

Hey Rummy. In this case, per the way ak0607 stated the problem, the key word for me is "test." For the > to be with Ho it would have to be an assumption not something that is being tested for. To test for >255 the assumption in the null would be the opposite.

Ah, Brandon - you are a godsend! If I understand statistics this term, it is because of you! :)

Best youtube stat tutorial I've seen yet!

Hey sabo! I appreciate your comments. How did everything go for you?

Awesome and easy to understand explanation of the topics!Your understanding of the topics is excellent and your presentation as well.

This is very useful because it goes into great depth, breaking down the information well.

Great video! Brushing up for exams and this really solidified some compromised foundations. Appreciate all of those who take their time to make educational videos like this. Keep it up sir!

This chapter was really confusing but your teaching method helped me understand it better. I'm subscribing.

I became fan of yours Brandon ,you made subject very clear ..Thanks .

Simple and beautiful explanation for NULL hypothesis, fail to reject null hypothesis and rejecting null hypothesis with 355 ml water bottle. cheers to 355 ml water bottle. Thank you so much uploading nice video.

Your videos are very helpful. I am new to stat and learning slowly.

Thank you so much for simplifying these concepts. Your comprehensive explanation has been incredibly helpful!

Thank you so much!! This is so helpful! I am grateful that I came across your tutorials as I am struggling with this course once again. Your encouraging words were very nice to hear as well. Thanks so much for your time in making these! I plan to use your tutorials weekly to get me through this semester! :)

I felt like the video only started to discuss new concepts 13 minutes into the video and you could have maybe considered making it shorter as all the concepts prior to the 13 minutes were covered in the last video.

You did an excellent job explaining null and alternative properties! Thank you!

I can't believe I understand these concepts just by watching these videos.

thanks, you make very easy the hardest part of statstics

Thank you so much for helping me understand statistics. Is super hard for me!

Awe thank you! ;) You had it in you the entire time. I am sure your maths teacher means well it is just that people learn best in different ways. So I am very glad you found them helpful. Hope everything went well for you. :) - B

i can't believe they call this stuff basic.

explained so well.. i like way u explain every detail.. thanks..

Thank you for your awesome videos. Thank you for your pep talks at the beginning and the end of the videos.

Thank God for you!! If I dont pass Stats and ANOVA I cannot continue my Degree. I am now more confident of Stats by watching your lectures. I will graduate thanks to you and You Tube. Your address please so I can send you my first-born.

If only you were my professor..

Awesome & easy to understand explanation.. Ways to go...

Thanks so much for making and sharing this extremely educational tool. You have simplified it so that beginners like me can grasp the concepts. thanks again.

Without seeing what you are seeing it is hard for me to comment. But the null and alternative hypotheses have to be all-inclusive on the distribution curve. An Ho with just an = sign as a one-tailed test does not make sense. If just = is used, then the rejection region could fall on either side (two tailed). The sign/equality in Ho and the one or two-tailed non-rejection regions are inseparable.

Thanks!!!! I'm actually a graduate student taking statistics again and needed to get back to basics. Very helpful. I can't wait to watch more. That seems weird since I hate stats lol

Hi Brandon! I have found this video extremely helpful thank you for taking the time to upload this. Extremely appreciated! Allison

This is an excellent video - but I keep getting distracted because you sound EXACTLY like Seth Rogen. Thanks for the vid, please keep them coming.

Amazing video! Explanations are awesome.

Could you please explain this? 30,000 students Average: 5.5 years to graduate Years in college until graduation are normally distributed with the standard deviation of: 0.8 Sample mean for 16 political science student: 5.8 years 1. Write a set of hypotheses (null and alternative hypotheses) to answer the question Ho: M : 5.5 H1: M is not 5.5 2. Test your hypotheses. - 2.1. Show a sampling distribution of the years in college for KU students using R. Submit your R commands, as well. - 2.2. What is the probability of a KU student taking longer than 5.8 years to graduate? - 2.3. Report the result of your hypothesis testing.

My teachers should watch this and learn.

Your videos are great and thank you for the extra encouragement at the beginning and end.

Very very clear lecture. Thank you very much.

This video is the bare basics. Good for people struggling. I guess this was the wrong video for me but it seemed like you touched on every concept like 3 times and it became redundant

Thank you! How did everything go???

Thank you so much! you are a great teacher I know!

That voice is audible chocolate, thanks for the videos :)

An outstanding class and professor, thank you.

Another great lesson.

Thank you for clearing up the concepts. I wish I had found this video before my last quiz, lol. Now I am armed with this information for my final!

thanks, your videos really helping me at the moment with my stats ...

Really good video. Thanks for the dedication!