Тёмный

Using the t Table to Find the P-value in One-Sample t Tests 

jbstatistics
Подписаться 209 тыс.
Просмотров 945 тыс.
50% 1

I work through examples of finding the p-value for a one-sample t test using the t table. (It's impossible to find the exact p-value using the t table. Here I illustrate how to find the appropriate interval of values in which the p-value must lie.)

Опубликовано:

 

1 окт 2024

Поделиться:

Ссылка:

Скачать:

Готовим ссылку...

Добавить в:

Мой плейлист
Посмотреть позже
Комментарии : 225   
@RayOnRae95
@RayOnRae95 9 лет назад
tomorrow's my exam so here i am! laziness is a disease that's hard to cure lol
@caileighreddy9112
@caileighreddy9112 9 лет назад
+RAY S lol
@ComeCorChof
@ComeCorChof 7 лет назад
me right now
@اطلبالحقوالرحمة
watch this you'll change ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-arj7oStGLkU.html
@MohamedEssam-fd4en
@MohamedEssam-fd4en 5 лет назад
@@اطلبالحقوالرحمة This was so helpful, thanks for sharing
@onatovonatovic526
@onatovonatovic526 4 года назад
me right now
@JusticeLeagueMedia
@JusticeLeagueMedia 10 лет назад
I was struggling with this for a good hour, Thank you so much man!!
@sofielubcke8580
@sofielubcke8580 3 года назад
same bru
@alexandrashvydun8726
@alexandrashvydun8726 Год назад
me too
@benpark913
@benpark913 4 года назад
A simple, easy to understand explanation of t-table usage. Thanks!
@MollyKeeter
@MollyKeeter 10 лет назад
I literally could not understand this concept in my stats lecture, so frustrating, but this has helped me immensely! Perfect for finals!
@jbstatistics
@jbstatistics 10 лет назад
I'm glad to hear it helped you Molly!
@Ze-Germanzuk
@Ze-Germanzuk 10 лет назад
Got my resit tomorrow and still don't think I understand half of the equations.
@songgalackchoi5556
@songgalackchoi5556 8 лет назад
Hi there. I am an international student and I am taking Stats this semester. So fat, I never understood what the concept of this chapter and previous chapters. Therefore, I looked up the solution manual and tried to search the definition with calculation problems. However, it was really difficult to understand. Once I stepped in here, my brain wakes up and everything is clear now. I mean, thank you for sharing this fantastic video and I can not wait to test following Monday. Again, thank you so much for this awesome video,
@jbstatistics
@jbstatistics 8 лет назад
+ryan andie You are very welcome Ryan! I'm glad I could help. Best of luck on your test!
@chaksyt6926
@chaksyt6926 Год назад
sana all
@jbstatistics
@jbstatistics 11 лет назад
I don't use linear interpolation in this situation because it's not a linear function. I think it might be misleading for some students and in my opinion it's just not worth it. Cheers.
@arcane_whim
@arcane_whim 10 лет назад
had to log in to thumb this up :)
@jbstatistics
@jbstatistics 11 лет назад
You are very welcome Vinayak. And thanks very much for the blessing!
@CHANTI8947
@CHANTI8947 8 лет назад
Is there any difference in the computation of t-value for right-sided hypothesis/left-sided hypothesis testing. For a given dataset, I can derive a t-value with SD/(sqrt(n)) which would be the same for both left/right sided hyp testing. Then according to you, the p-value on the other side of the test would be (1-Alpha). I am just wondering if the p-value just differ based on the side we chose to test?
@jbstatistics
@jbstatistics 11 лет назад
The title of this video is "Using the t Table to Find the P-value in One-Sample t Tests", and the video addresses that specific topic. I discuss alpha in other videos.
@jbstatistics
@jbstatistics 11 лет назад
You are very welcome!
@TinyMaths
@TinyMaths 5 лет назад
I just did an exam where the t-value was 5.1, and the degrees of freedom was 147. t-values go up to 5.0 in the statistical tables, couldn't figure out how to handle it. Most of the other questions the t-values or z values were not in the table, but were somewhere between consecutive t values, which made finding p and other values very time consuming. To be honest I wasn't really ready for these challenges. Well, back to the shed for more practice.
@datfox0722
@datfox0722 7 лет назад
Why am i doing this for a zoology degree
@anshumanSrivastavaHere_I_COME
@anshumanSrivastavaHere_I_COME 8 лет назад
Many thanks from a 3rd year engineering student, taking stats!
@gregtheflyingwhale
@gregtheflyingwhale 5 лет назад
And I am 1st year Business Administration Student!!! WHY THE FUCK AM I DOING THIS??
@Dertador
@Dertador 3 года назад
@@gregtheflyingwhale political communication student here, I don't even question it anymore lmao
@gregtheflyingwhale
@gregtheflyingwhale 3 года назад
@@Dertador good luck man....
@2tall2wallk
@2tall2wallk 10 лет назад
I still don't get how you use software to find the P-value!
@halohellocj
@halohellocj 10 лет назад
Me either!
@LilRij
@LilRij 9 лет назад
You won't ever be asked for the P value on a written test. However you can be asked for the percentage interval it falls into.
@halohellocj
@halohellocj 9 лет назад
No my professor asked for the P value on our written test, but depending on the problem you can use the JMP software to calculate it
@LilRij
@LilRij 9 лет назад
halohellocj You can find P value for Z distribution you can't find P value for T and Chi distributions without Software.
@LilRij
@LilRij 9 лет назад
raj patel however, you can find the interval for the p value "(ex. 2.5% - 5%)
@Nem3siS4o
@Nem3siS4o 9 лет назад
Great Video! Everything makes so much sense now! Much appreciated! :)
@jbstatistics
@jbstatistics 9 лет назад
Thanks. I'm glad to be of help!
@hibye-ji8cd
@hibye-ji8cd 8 лет назад
Hello I have this question... when you're calculating the t value of a t distribution, under a null hypothesis for a 2 tailed test, would you always get a negative value of t (like in 4:14, the t=-1.31)? and why?
@pradiphui7983
@pradiphui7983 3 года назад
Very good explanation sir 🙏🙏🙏
@ilo5736
@ilo5736 7 лет назад
Thanks! Professor handed us the table and never showed us what anything meant!
@DivineVortex
@DivineVortex 6 лет назад
Great explanation. Simple, clear, and to the point. It made it really easy to understand... i wish we had you and RU-vid 15 years ago when I wast in HS.... lol
@jbstatistics
@jbstatistics 6 лет назад
Thanks for the kind words!
@mohammedhajomar4400
@mohammedhajomar4400 5 месяцев назад
great video thanks
@jbstatistics
@jbstatistics 11 лет назад
Okay. This video is the best I can do on this topic.
@fongjason9864
@fongjason9864 7 лет назад
hi please speak
@chameeranissanka1687
@chameeranissanka1687 9 лет назад
Thankz buddy :) You are a lifesaver (y)
@jbstatistics
@jbstatistics 9 лет назад
Chameera Nissanka I'm glad to be of help!
@PolgurMichael
@PolgurMichael 8 лет назад
Excellent work with this video - crystal clear now. Thanks!
@jbstatistics
@jbstatistics 8 лет назад
+Polgur, Michael You are welcome, and thanks for the compliment!
@paulchen355
@paulchen355 Год назад
paying 1000 dollars for tuition and here I am skipping lectures to watch RU-vid. GG
@AngeSim221
@AngeSim221 8 лет назад
So glad I found your video. It was very easy to understand, thanks for the help.
@mehdibakessou4858
@mehdibakessou4858 7 лет назад
Great tutorial! But I was wondering how come you used df= n-1, while in class we are using df=n-2? When do you know which one to use?
@georgehaddad1511
@georgehaddad1511 7 лет назад
same question here
@hamzahafeez2909
@hamzahafeez2909 6 лет назад
When there are two samples, then n-2 is used.
@bigseekersb
@bigseekersb 2 года назад
When doing a TWO-sample hypothesis test with a t-distribution, having 2 sample sizes n1 and n2, the df = (n1 - 1) + (n2 - 1) = n1 + n2 - 2.
@shashiku663
@shashiku663 7 месяцев назад
Excellent , Explanation and example are awesome, Thank you very much
@MegaOxford2011
@MegaOxford2011 11 лет назад
I must say that I am blessed I found your videos. You are doing great job. God bless you !!!
@TheMsMAOMAO
@TheMsMAOMAO 9 лет назад
Just wanna say thanks for making the video. It was very helpful! I hope you keep making them
@THESONICSPEEDDEMON
@THESONICSPEEDDEMON 3 года назад
Holy crap this vid actually saved my life, good thing there was an example of the exact kind of problem. Wouldn’t have gotten that one answer right on khan academy lol
@airanarellano7372
@airanarellano7372 9 лет назад
How do you know which number to put 1st? .01 or 0.025 ?
@testMau-nb8nj
@testMau-nb8nj Год назад
Hey, how can I get the exact P-VALUE of t test using students t distribution table? You didn't teach howw
@jbstatistics
@jbstatistics Год назад
I didn't teach how because it's impossible. If you want the actual p-value you need to use software. Some people use linear interpolation to approximate it, but I think that's a waste of time and misleading.
@jbstatistics
@jbstatistics 11 лет назад
Thanks!
@derpdude42
@derpdude42 4 года назад
so how the fuck do you find the p-value without software then!
@animel8ve
@animel8ve 8 лет назад
Great Tutorial man
@jbstatistics
@jbstatistics 8 лет назад
Thanks!
@zymenomad9516
@zymenomad9516 7 лет назад
jbstatistics o.o soooo, is this Z testing? due to the alternative?
@saurav-sky55
@saurav-sky55 3 года назад
this really helped but if i dont have the software then how do i get to a solution
@tanveerahmedsiddiqiph.d.9557
@tanveerahmedsiddiqiph.d.9557 3 года назад
For t = -1.58 and t = -1.82, it means that the interval of P-value should be same but there is a different p-value in a book for t = -1.82 (for 7 degree of freedom) which is outside of the interval [0.1, 0.2]. Why?
@davidtran4821
@davidtran4821 9 лет назад
omg help guys, my tstat i found is -0.9318. I looked at the table and it's only positive values. how do i find the p-value from this and my d.f is 17. Help please =(((
@kerokero_furogu
@kerokero_furogu 7 лет назад
You're not using the t-table to find the p-value in this video. You still calculate it from software. Maybe you should rename this video to "Using the t-table to obtain a very rough estimate of the P-value in one-sample t-tests"
@winniechan7239
@winniechan7239 8 лет назад
sorry, may I ask something? If my test statistics =24.5519 n =8... d.f 7
@realzexfest2481
@realzexfest2481 5 лет назад
Why that null hypothesis not equal and geater than sign?
@sanjidasan6556
@sanjidasan6556 4 года назад
Thank u. But one question With df 8,p(-2.5
@sbtmirza329
@sbtmirza329 6 лет назад
very helpful! thank u so much! gonna ace this test!!!
@jbstatistics
@jbstatistics 6 лет назад
You're very welcome. Best of luck on your test!
@sundarjibbu
@sundarjibbu 10 лет назад
why would you call a negative t-value any more absurd than a positive one?
@jbstatistics
@jbstatistics 10 лет назад
I wouldn't.
@ლიბრა
@ლიბრა 6 лет назад
i have one question. its one sample test. so there is one sample. DF = n - k - 1 . so wouldnt it be 8 and not 9?
@jbstatistics
@jbstatistics 6 лет назад
No, it's a one sample t test and the degrees of freedom are n-1.
@ლიბრა
@ლიბრა 6 лет назад
oh i got it wrong. thank you
@rakaalrian5659
@rakaalrian5659 4 года назад
how about negative t value sir? for example t = -2.14, how can we find the p-value with that?
@jbstatistics
@jbstatistics 4 года назад
There's a negative test statistic example in this video. I think of these things :)
@rakaalrian5659
@rakaalrian5659 4 года назад
@@jbstatistics Yes, I'm aware of that sir. But in the video we got negative t from the two-sided test, isn't it should be different for one-sided test?
@chelseathompson4681
@chelseathompson4681 9 лет назад
LIFESAVER.
@noviyantinandasari
@noviyantinandasari 6 лет назад
Thank you very much for solving my problem! Have a nice day!
@mexycanenglish4888
@mexycanenglish4888 11 лет назад
Can you please transfer to Brock and replace the Russian guy sometime in the next few days?
@Banaan1985
@Banaan1985 9 лет назад
Thank you jbstatistics. These youtube videos are a big help!
@me-cw8sm
@me-cw8sm 4 месяца назад
how do you input the info to a calculator to get the p value??!! pls help
@jbstatistics
@jbstatistics 4 месяца назад
That would depend on the calculator, and typical calculators do not have the appropriate function. The tables exist because these values are found with software, and people do not always have access to appropriate software. A calculator along the lines of a TI-83 would have a function to do it. A typical $10 calculator will not.
@hmtnhk
@hmtnhk 4 года назад
How to do it if I don't have software??
@Undersc6re
@Undersc6re 6 лет назад
I literally have a collection of your videos under the folder name JBTheGod! Thank you man!!!!
@AstroWiseWithKai
@AstroWiseWithKai 4 года назад
hi, so can we find p value manually and not using any software?
@thies2us
@thies2us 9 лет назад
Can you do an example where the t-value is negative for the 3 scenarios (< , > , not equal to). Thank you.
@ruik7797
@ruik7797 4 года назад
very helpful. thanks
@aloranesting
@aloranesting 4 года назад
can you do a video on finding the p-value for a two-sample t-test?
@educationbd4832
@educationbd4832 11 месяцев назад
Thanks ❤❤❤
@Phillyballplaye
@Phillyballplaye 10 лет назад
how do i find the p-value for T tests on minitab. I know how to do Z but with T I keep getting it wrong
@toreadmeet5070
@toreadmeet5070 3 года назад
how can using a software ???
@sheilawidjaja7331
@sheilawidjaja7331 9 лет назад
Thank you jbstatistics. You are such a life-saver.
@tatianavermisheva7235
@tatianavermisheva7235 4 года назад
Exellent explication!!! Thank you so much!!!
@dantheman9319
@dantheman9319 6 месяцев назад
youre a fucking god
@MultiHashoma
@MultiHashoma 4 года назад
Merci beaucoup
@amolkabugade3728
@amolkabugade3728 4 года назад
Awesome explanation
@19chavela81
@19chavela81 7 лет назад
final on Tuesday, for behavioral sciences
@sandunbuddhika3478
@sandunbuddhika3478 2 года назад
Great video ☝👍👍👍
@ozairkhan9699
@ozairkhan9699 8 лет назад
best video.. made my problem solved ! thumbs Up
@momoyaka
@momoyaka 11 лет назад
Nice videos. Why don't you simply use the linear interpolation to find the p-value 0.021?
@johnwebb2471
@johnwebb2471 4 года назад
Thank you.. Like others, I was struggling with this and now I've got the concept.
@lhorkef
@lhorkef 3 года назад
Isnt 7 not big enough
@ricardomateus4285
@ricardomateus4285 4 года назад
bruh this shit wrong
@43lizeqi98
@43lizeqi98 4 года назад
have to leave a comment
@jackdavis8596
@jackdavis8596 Год назад
Do we need a significance level to find the p value?
@jbstatistics
@jbstatistics Год назад
No. The p-value is based on the data. We can then compare it to the significance level, if we have one in the given situation.
@tashamok6404
@tashamok6404 8 лет назад
hey why do we need to double the area for the last example?
@jbstatistics
@jbstatistics 8 лет назад
I discuss that in other hypothesis testing videos (e.g. ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-m6sGjWz2CPg.html). This video is dedicated using the t table, and so I don't get into any of the concepts.
@MeIchom
@MeIchom 11 лет назад
You seem to have left out a description and implementation of alpha.
@christabelehinmisan1988
@christabelehinmisan1988 3 года назад
Thanks a lott
@ncheee1
@ncheee1 8 лет назад
p value is similar to level of significance?
@jfrances2143
@jfrances2143 4 года назад
How can I find the t value for 63
@ulanbekalmazbekov9889
@ulanbekalmazbekov9889 3 года назад
Thank you
@bokadem
@bokadem 5 лет назад
amazing
@claudiamesaaparicio8517
@claudiamesaaparicio8517 4 года назад
bravo!
@rc9977
@rc9977 9 лет назад
Brilliant thankyou so much. I am a university student studying mathematics and needed to refresh my memory on p values
@davidp2007
@davidp2007 10 лет назад
This video saved my butt! thanks dude! very clear explanation
@jbstatistics
@jbstatistics 10 лет назад
You are welcome David.
@M1sterHamilton
@M1sterHamilton 8 лет назад
very nice man
@rimmyblumpkin5858
@rimmyblumpkin5858 5 лет назад
Too boring, switching videos
@jbstatistics
@jbstatistics 5 лет назад
I hope you find the excitement you seek, in the inherently captivating subject of looking values up in a table.
@winsonchow
@winsonchow 10 лет назад
Simple explanation.. straight to the point... Great job... thkx ya..
@jbstatistics
@jbstatistics 10 лет назад
You are very welcome Winson.
@modern7warfare7
@modern7warfare7 9 лет назад
What about problems where it doesn't give you 2.59?!?!?!?!?!?! NOBODY WILL EXPLAIN THIS I have problem where it gives me a percentage and level of significants
@LilRij
@LilRij 9 лет назад
what's your problem type it up
@LilRij
@LilRij 9 лет назад
raj patel Ex: i got this in my math textbook: s. mean = 106 n = 100 s.sd = 35 Significance level = 99% H0: U 100 what you do is: significance level = .99 alpha (a) = 1 - .99 alpha (a) = 0.01 Ta/2,n-1 = T(0.025)(99) T = 2.626 [which is known as the rejection region]
@bluewolfer
@bluewolfer 9 лет назад
raj patel Wouldn't the t/2=.0025?
@colesandberg5857
@colesandberg5857 9 лет назад
T=(sample mean-population mean)/(sample std dev/sqrt(sample size))
@LilRij
@LilRij 9 лет назад
bluewolfer oh sorry -.- i'm so accustomed to having 0.05 as alpha i wrote 0.025. The real answer is Ta/2,n-1 = (.1/2 ) (99) = (.005)(99) T critical = 2.626. it wouldn't be .0025 because, .001 / 2 = 0.005. Nonetheless, the if alpha was 0.05, then it would be 0.025.
@mitikuamanumesele3975
@mitikuamanumesele3975 6 лет назад
Very nice presentation; but sir can we determine the exact p value in betwwen two p values and two t values using interpolation?
@jbstatistics
@jbstatistics 6 лет назад
It's not a linear function, so you won't be able to determine the exact p-value that way. Some people do recommend approximating the p-value in such a fashion, but I don't. (I don't think it's worth it, and we typically use software to find the exact p-value.)
@evalombardo7985
@evalombardo7985 7 лет назад
You explained it so well, it was really helpful ! :D
@shinchiwarrior
@shinchiwarrior 7 лет назад
great vid... thanks!
@leebickford1373
@leebickford1373 6 лет назад
Great explanation! Thanks very much.
@jbstatistics
@jbstatistics 6 лет назад
You are very welcome!
@powertothepeople12
@powertothepeople12 9 лет назад
This may be a silly question but in 4:44 how did you know to look at the left tail and not the right tail? do you just look at the smaller tail? Very helpful video btw, thanks.
@LilRij
@LilRij 9 лет назад
For the alternative hypothesis with > you look at the right tail ex. U(mean) > 2 = Right tail test For the alternative hypothesis with < you look at the left tail ex. U(mean) < 2 = Left tail test. For the alternative hypothesis with "does not equal" you look at both tails (Multiply P Value by 2) ex. U (mean) =/ [does not equal] 2 = Two tail test
@powertothepeople12
@powertothepeople12 9 лет назад
raj patel got it, thanks!
@Jusfin
@Jusfin 5 лет назад
Thanks so much, you explained it better than anyone that I have looked at.
@jbstatistics
@jbstatistics 5 лет назад
I'm glad to be of help!
@bentedesco6318
@bentedesco6318 7 лет назад
Sample obtained
@M_Dragon
@M_Dragon 10 лет назад
Perfectly explained and extremely helpful!
@jbstatistics
@jbstatistics 10 лет назад
Thanks Daniel! I'm glad to be of help.
@nourelhayat3979
@nourelhayat3979 7 лет назад
? Please I want an answer to how to calculate the p value
@jbstatistics
@jbstatistics 7 лет назад
As the title implies, this video is about using the t table to find the p-value in one-sample t tests. In many settings (t tests included), there isn't a formula that enables us to calculate the p-value without using software or a table.
@nourelhayat3979
@nourelhayat3979 7 лет назад
This title is my proposal Construction of a parametric test of the ؟؟ estimator of the extreme value index under censored data Any Help ?
@HeShoeTooBig
@HeShoeTooBig 7 лет назад
what software can you use. All I hear is "software software software". What software. Man. I don't like this subject. I have one more week and when it's done all of this non-sense will leave my mind forever
@jbstatistics
@jbstatistics 7 лет назад
There are many software packages that can find these areas. I typically use R, but others use SAS, STATA, Excel, SPSS, Minitab, Maple, various web apps, etc. So I make a generic reference to software, as viewers will be using a variety of software packages. Feel free to think of the study of statistics as nonsense and purge it from your mind. Your loss.
@danielleschreader8539
@danielleschreader8539 9 лет назад
Very helpful! Thank you for your clarity.
Далее
t-Test - Full Course - Everything you need to know
16:14
#慧慧很努力#家庭搞笑#生活#亲子#记录
00:11
ХОМЯК ВСЕХ КИНУЛ
10:23
Просмотров 583 тыс.
P-Value Method For Hypothesis Testing
17:48
Просмотров 1,6 млн
What is the t-distribution? An extensive guide!
20:49
Просмотров 217 тыс.
Introduction to the t Distribution (non-technical)
8:54
Explaining The One-Sample t-Test
16:23
Просмотров 11 тыс.
T-test, ANOVA and Chi Squared test made easy.
15:07
Просмотров 298 тыс.
Find a pvalue using a t table
4:56
Просмотров 22 тыс.