# z-score Calculations & Percentiles in a Normal Distribution

I show you how to calculate Z-scores and find areas under the bell curve…p-values. I will also show you how to find statistics from areas under the curve…such as quartiles.

You can find p-values with a calculator as well. This is what it looks like on a TI-NSPIRE

TI-NSPIRE Z score to Pval & Pval to Zscore NormCDF invNorm

Check out http://www.ProfRobBob.com, there you will find my lessons organized by class/subject and then by topics within each class. Find free review test, useful notes and more at http://www.mathplane.com

How can I find the percentile if they give me only the standard deviation? I got stuck only for this for the home test. thanks million of getting your response as soon as possible

Informative and funny! Thanks for the help Professor Rob!

Bro you totally saved my life!!!! THANK YOU SOOO MUCH!!!

Great Prof. I salute this man. Now I can sleep with ease and at peace. Thump up!!!!!!!!!!!!

Thank you!!

how do I use z score to calculate a variable: eg, I have a z score of 1, a mean of 33,266, and a standard deviation of 22,333… how do I apply this information to figure out what the actual variable is that's represented by this z score

I am taking a stat class for a graduate education degree and as a history teacher, math has never been my strongest subject. Thank you for these videos. From one Bob to another.

you mentioned that if a problem says the data is normal it will follow with asking for z score but is there a possibility they might ask for t score or should i just assume it's asking for z score? For the frqs on the ap exam

nice entree SIR hehehe

You saved my life, and my exam score; which is in 30 min minutes … God bless your soul

i love how enthusiastic he is lol

He is too fast… nope ty

He is too fast for my slow brain…