Using a table to estimate P-value from t statistic | AP Statistics | Khan Academy

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Example of how to use a t table to estimate a P-value.
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Thank you, Sal and everyone in the Khan Academy. You guys are doing a wonderful job for people like us who belong to marginalized communities.Someday in future, I also look forward to contributing for this noble cause❤

[@KMacFNP]

I am taking a medical masteral class and is "forced" to take statistics as a requisite. This thing is not my forte` and I find it difficult. I have read 2 books about it and achieved nominal improvement....darn. Your video is quite helpful and I thank you for uploading it.

[@ibrahimabdirahman9586]

I swear, I am setting a test for Estimation and Hypothesis testing. This is so so so helpful. Thanks Sal Khan. From Somaliland.

[@hiitsme-v2n]

You explained it so much better!!! I wish i had ya as my college professor haha

[@ronzonmusic]

This is a great video, thank you for the short, simple and clear instruction!

[@jjj1981jj]

Not enough videos about this out there! HALP! And thanks.

[@ShesArizza]

omg thank you i was so confused abt the t-chart because my professor didnt explain it properly they just jumped into example questions in our note slides i was a bit lost where she was getting all her values from >:( but this video helped me understand it better, thanks!

[@vikasbidla7669]

You can add to say that Hypothesis testing is based on Alternative Hypothesis and here Ha -> is mean not equal to 0, ( could be less than 0 or could be higher than 0) means that it's two tailed. Also to mention when variance is unknown we use t dist.

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Best explanation I saw till date!

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i love this guy so much

[@johnnyroc]

Just curious, do you guys find this easy? I find it incredibly hard. I have to pass Econometrics feels like mission impossible.

[@freddymendoza9393]

No lol taking an online college statistics class over the summer is a huge pain. Take me back to the good ol days when I only had to worry about finding the median.

[@jsou-gm4tu]

Thanks for making this easy

[@smr0018]

Thank you so much for this great explanation 😍

[@melikadastgheib631]

This is so helpful! Thanks much!

[@Yassin-Ghassan-Taha]

Thank you, this is helpful

[@GamersHaven]

This would be a lot better if instead of using filler variables, you used the actual equation next to it. I still don't understand the solution.

[@heidiheidicheng3507]

Bravo! you saved me!!

[@teljnyazhka]

you guys are the best

[@stridewang253]

U made things easier

[@ibtirose]

Is the observed value the same as P-value?

[@HoreKrishna-f8w]

Hello sir i need this table

[@youngpudding845]

You saved me 15 minutes before the exam 🫡😂

[@miakang7041]

thank you

[@lorealpetersen1529]

Saved the day.

[@frida5871]

What if my T value is negative? How do I get the P value in this table?

[@karthiklogan9384]

You can ignore the negative sign and compute the p value.

[@cutepotato9322]

thnx😍😍🙏

[@jasvinderkaur4697]

Sir is this t test one tailed or two tailed

[@haoyuwang3311]

very clear

[@nimeshmishra403]

Very helpful

[@theplug2983]

Fiiiinnnaaaalllyyyy I understand

[@jamshid3766]

+++++++

[@ramnareshraghuwanshi516]

finally found!! Thank you

[@karraraqeel4041]

شكرا استاذ

[@xExtremeFrissonx]

So she can be 96% confident that her hypothesis is correct?

[@genesis9138]

what if the question is t > 2.51 with a df of 30
it doesn't say t is 2.51 so I don't know what to do
if I say t is 2.51 I get the question wrong

[@alexsale1569]

pause this video and find it out, that's why I am here

[@404TRUCKERTV]

omg, how do you know all of this lol, thanks

[@hebank212]

Thank youuuuuu 😇

[@natalieannemartin]

This doesn't help me! How do you find the EXACT p-value?

[@celltower1]

I don't think you can without Z being given. If it were you can calculate the exact P value using the z table

[@natalieannemartin]

Matthew Harding yep, I realized I was using an incorrect t table, so that’s the reason my answer was coming out differently.

[@Johnjarl7085]

Thank youuiiiuuuu

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Thaaaaaaaaaaaaaaank youuuu!!!!!!

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🐐

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Second comment

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ImmortalNub I am the third comment.

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ImmortaINub i am 5th comment

[@mahdieuch144]

One mistake: the degree of freedom must be equal to n-2

[@darkstardream1551]

degree of freedom is equal to the n-total number of a variable so it is right

[@bdgameplay2936]

First comment