Calculating a P-value given a z statistic | AP Statistics | Khan Academy

Example showing how to use a standard normal table to estimate a P-value.

AP Statistics on Khan Academy: Meet one of our writers for AP¨_ Statistics, Jeff. A former high school teacher for 10 years in Kalamazoo, Michigan, Jeff taught Algebra 1, Geometry, Algebra 2, Introductory Statistics, and AP¨_ Statistics. Today he's hard at work creating new exercises and articles for AP¨_ Statistics.

Khan Academy is a nonprofit organization with the mission of providing a free, world-class education for anyone, anywhere. We offer quizzes, questions, instructional videos, and articles on a range of academic subjects, including math, biology, chemistry, physics, history, economics, finance, grammar, preschool learning, and more. We provide teachers with tools and data so they can help their students develop the skills, habits, and mindsets for success in school and beyond. Khan Academy has been translated into dozens of languages, and 15 million people around the globe learn on Khan Academy every month. As a 501(c)(3) nonprofit organization, we would love your help! Donate or volunteer today!

[evanwilson]

You and Organic Chemistry Tutor deserve the metal of honor for helping me pass calculus, stats, and linear algebra

[rachelguerra]

I just spent like 45 minutes ripping my hair out because I couldn't figure this out and this video saved my sanity.

[dwaekkie_pump]

Literally just needed to know how to use the chart and LITERALLY no one else showed how!😭😭😭 I have a test in 15 minutes!😭 thank you! Adding to our teachers being not that great, now with online learning, they don't even respond to emails of queries concerning school work.🥺🥺 this saved me.

[MaddyReactions]

I give Khan Academy 100% credit for my A in Statistics!

[seanlee]

You are way better than my Stats professor, and he teaches at one of the top 5 MBA programs.

[henlosnyder]

This video really helped me to understand what and how the p-value is, really good video.

[divyanshusrivastav]

After a long time, I just figured out now what is exactly p value with more precisely from diagram....
Thanku khan Academy ♥️

[kevinshao]

Thanks for the great video. If I may one question: 1:48, how did get that formula for sampling standard deviation (or error) ? Could you please advice? Thanks a lot!

[KanisFatimaTithi]

It's a very helpful & easy technic. Thank You So Much.

[BradRowlands_]

Goodness me this video is superb. So concisely explained!

[a-wingsgaming]

You are a LEGEND. Thank you so much! This helped me so much! 😁

[innawendell]

For some reason, when I do the calculations for the z score, my result is not 1.83 but 1.75. What could be the problem?

[Revboiuk]

shouldn't it be a right tailed test as we have to check the rejection region Ha(p) > 0.26?

[roseytb]

how to calculate the p-value of the log rank test?

[rabeccanchocholo]

my problem was how to use the chart but now its no more, thank you

[misiek_xp]

May God reward You in children as we say in Poland.

[miczerb]

What is p-value if z is 6.67. When z table is limited to

[SignaturecreationsLLC]

Sooo where do you get the p value table from?

[atulkadam]

How you decide the value 0.0336 as P value?
I couldn't Understand

[earlymorningcodes]

hello sir its a two tail test so the value of P=.336*2=.0672.