P Values, z Scores, Alpha, Critical Values
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- Опубликовано: 21 авг 2024
- A visual tutorial on p values, critical values, z scores and alpha. Video includes how they are related.
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Professor of the Universe: David Longstreet
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I am a student who is neurodiverse, that struggles when learning is limited to the classroom setting, time, presentation etc... and your mission is so helpful to me. Thank you so much for what you do.
so you're special ed LOL
I have learnt the concept of p-value for more than 8 years and this is the first time that I fully understand the meaning of it with your straightforward illustration! Appreciate it!
3rd year stats student, still watches videos on what p-value is. Excellent video, thank you!
I am finance professional, with age (42 now) I forget the concepts sometimes as i always believe to be rooted to the basics and thank you so much for your graphics and so well explained
I cannot thank enough for the videos! You literally saved my academic life!
Great simple graphics, no fancy professional statistician language to fly over my head. Finally FINALLY go these meanings. Thanks so much.
no linked video for critical value dude
checking .025 in Z-table gives you 1.96 i.e checking alpha or alpha/2 in z-table gives the critical value.
thank you for the explanation. I'm a statistics major student, but i barely remember this things and just trying to find out about the meaning of p-value again before my exam. I really appreciated your video. Thank you!
After receiving many explanations, I now FINALLY understand it thanks to you. Thank you for sharing your knowledge!
I really wanted to say thanks to you because with this small, simple video and your outstanding illustration approach, you helped me to get my Udacity practical statistic project done as a part of their data analyst nano-degree. Thank you so much
I am literally crying and so glad I found this.
If only i had found this channel before my exams
damn
You are the best thing to happen to me in RUclips !!!Finally i really got what is alpha and p value!
This is one of the best videos I have found explaining these concepts. Thanks a bunch!!
Wow...so clear, concise, and easy to understand. Thank you!! I WAS struggling with the distinctions until THIS video. My LOC has increased:;)
I've watched a million videos on youtube and nothing compares with this, finally i understand p.
Finally, I've understood the p-value actual meaning from this video
Thank you very much!
there is no link in the there to tell us were the 1.96 comes from
Its the z score
yes :(
It's the standard Z-Score, which is based on the standard assumption that you're solving for a 95% confidence interval, leaving 5% for the margin of error (2.5% divided evenly among both sides). Looking up the Z-Score for 2.5 (which is .025) backwards on your table, you'll find that it's Z-Score is 1.96.
how is that calculated?
I really don't get this part: 'Looking up the Z-Score for 2.5 (which is .025) backwards on your table, you'll find that it's Z-Score is 1.96.' ? How is that calculated?
Thank you sir, your explanation has shed some light into my clouded mind when it comes to inferential statistics.
Thanks a ton for your classes on statistics. Your good work will add a lot of value to lot of people's career. It has generated a lot interested in me for statistics.
The best video that explains p value
Your instruction style is amazing! I really appreciate it. Thank you!
You’re the boss, man
well explained !! Nothing better than making it understandable. You are better than books!!!
Really a good video. You have a good methodology of teaching. It became much more clear for me after watching this video.
But PLEASE upload the links you have mentioned several times in the video!
Yeah it didnt have it for me either, could use this instead: ruclips.net/video/sJyZ9vRhP7o/видео.html
It can’t be explained any better. Thank you!!
Thanks God. Thank you for existing.
Very nicely explained. Slowly and calmly. Great video
Thanks for your videos. Although my Psychology lecturer tried hard, I didnt understand a word he was saying. Thanks for your help.
So simple yet powerful. Thank you so much for this. I was literally struggling
oh the thing is making sense now ,Your demo is excellent ,I have watched ten videos to grab this concept of p value ,now i get it
thanks
Thanks for the video! Probably the best that I've watched about this topic.
yeah! studying while sitting on the can! knowledge!
Great review. Clear explanation and humor (near the end). Take care.
Such beautiful video. Direct and with amazing explanations! Thanks for sharing!
This is very informative. I love the simplicity of your explanation. I just want to ask if there a specific critical value table for Jonckheere test? Thank you.
Just a minor correction, in order to find the exact p-value for a two-tailed test, you must multiply the area beyond by two. Therefore, the two-tailed probability for a z-obtained of 2.6 would equal .0047 x 2 = .0094 (using the rounded table values in the back of a typical statistics book, but the exact probability is actually .009322 as obtained through this probability calculator: www.socscistatistics.com/pvalues/normaldistribution.aspx). What you will notice with this calculator is the p-value always doubles if you select two-tailed instead of one-tailed.
(I teach statistics and was looking for a video to share with my students, but am afraid this error will throw them off. Is there a way for you to make a correction in the comments?)
Perhaps you should make your own videos...
statistics doesn't work it is a pseudo science, there is no logic in it. that is why so many students don't get it I still didn't got the answer on what p-value means, unless you can clarify it.
Excellent never ever seen such great details
This is simply great.
Thanks! This really helped me better understand the biostats portion of a presentation I have coming up.
This was a WIN! 5 minutes well done!
Well aren't you a breath of fresh air.
I did not read comments to not confuse my head, please enlighten me. In your example we can say that if the Z is 2.6 we can reject the hypothesis.
Thanks for de-complicating it! enjoyed watching the video and it clarified all my doubts!
omg!!!! you saved my life! THANK YOU!!!!!!!!!!!!!
Absolutely perfect discussion. Thank you so much!
thanks its really slove my problem my teacher was unable to explain
Best video I've seen. Love it!
Great video - thank you for taking the time to make this.
When you explain the p-value. Isn't it 0.025 in each rejection region?
excellent teaching. really easy n fun. the best.
Fantastic visualization. Thank you. I will share.
Thank you for the video. It clearly explains the concept of alpha and dividing it. Just a bit confused. You put the p-value without multiplying the p equivalent by 2, whereas for -z scores, we multiply the p equivalent by 2. Why is that the case?
Thank you very much for this video! It is really easy to understand.
Love your videos. Keep it up, sir
Joseph Angelo Arroyo Many thanks for you compliment. It is much appreciated. Hopefully you will like, share, subscribe, If you get a chance could you please like our FB page. www.FaceBook.Com/PartyMoreStudyLess
It will help others find the videos.
Wonderful. Greatness of teaching... Thank you, statistics is really fun...now.
Great tutorial, sir! But, did not find the video.
Statistics is the most boring fucking thing in the world but I thank you for making a little sense out of it for me.
actually helped with my cram session
Your lesson are super clear
thankyou this was really helpful!
Thanks! A great video!
The standard deviation units are important as well.
Very nice video and good info. Which software have you used for the animated demonstration?
this saved my life ty
you are simply great man
Hey really got my doubts cleared......but when calculating the one tailed test why we are taking the critical value as 1.645 even though we are taking the 95% confidential level....
Yes I gave you "like" , but would you please explain the Standard deviation and Standard Error . thank you
Thanks in a million. Awesome. Where have you been all these years? A+
I don't understand, why the 2.6 z score is in the rejection region, I thought the rejection region is 1.96 below, isn't it in the outside? I don't get it... :(
Rejection region is 1.96 and above
thank you so much sir 🙏
im confused... beacsue alpah significance can be different and will result on diff outcome of rejecting or accepting null hyptthesis p value is used but i dont understand how p value solves this problem
What if the given significance level is 0.025? Which alpha and a half would be 0.025/2= 0.0125 which is not on the top of the chi-square distribution table. How do I identify my critical/rejection region when alpha and half equals 0.0125
On a Std normal distribution table, Z-down = 1st digit...across = 2nd digit, correct? 100% based on the calculus of area under the curve, correct? So, how would 90 or 95% confidence instead affect the probability with same Z-score? Thanks from a middle-aged six sigma Green Belt student...
Really well done.
Thanks it was helpful
PLUS
OMG! This is so helpful!!!
May I ask what you platform you use to make the videos. It works smoothly whatever it is. Thank you for the stats help - it’s been a while!
I see no links to any of the videos you mentioned in this video.
I'm so confused. my book shows alpha .01 and alpha .05 and I dunno which one to use when I get t obt landing above t crit
Good video.
Well finally i can understand null hypothesis.
Thank you soooo much ❤❤❤
Which tables you shown , i referred many but what you shown is not available, Pls guide the name of the table
I thought I was the only one who had problems with stats in school, reading the comments I have some relief 😂, wish I had someone explain it to me this way, I would have at least a "B"
Thank you
Thank you!!!!!!!!!!!!❤❤❤❤❤❤
Excellent. explains
can you explain the difference between F test T test Z test and Anova? Thanks!
Thanks much for your videos. I'm a follower. Please make one about MANCOVA and Bayesian. Thanks!
nice video thank you
Hi David, the links you mention in this video aren't there.
Nice video. Thanks.
very clear explanation. thank you so much (y)
Whence did you get the +/-1.96 for each tail? I would take it this ought to be +/-2.5, given a 95% confidence interval.
Sorry, I guess you're referring to the number of standard deviations within which 95% of data lie. In this case, I would figure simply +/-2, with the confidence level of 95.4%.
Good. Please explain with an example.
Is it always 95% confidence level?
A little confuse on the P-Value????? Step by step please?
Beautiful, so glad I found this video!