Finding Area Under A Curve Using Z Scores

This video shows how to find the area under the standard normal curve using z scores.

[@andrewmolina3355]

Very helpful, you explained in 17 minutes what my professor has tried over the last 2 weeks

[@crowsmathclass]

Thank you. Glad it helped.

[@sugpolordplays2631]

WHY DO TEACHERS AND PROFESSORS MAKES THIS TOPIC SO COMPLICATED.

[@Eudaimonia1293]

I CANNOT THANK YOU ENOUGH FOR THIS VIDEO!!!! SERIOUSLY MY STATS PROFESSOR IS EXTREMELY DIFFICULT WITH EXPLANATIONS, AND YOU JUST MADE THIS 100X EASIER!!!! THANK YOU SOOOOO MUCH!!!! 🙏🙏

[@crowsmathclass]

You’re welcome. Glad it helped.

[@patricks.g.koehler8480]

You're my hero Steve, I watched several hours of content from my teacher and couldn't figure out what I learned here in 10 minutes.

[@crowsmathclass]

Thank you for the comment. Glad it helped.

[@prathibhasmily9151]

I hadn't understood anything in today's class but now I got the clarity. I seriously love the way you teach sir. Thank you so much😊

[@crowsmathclass]

You’re welcome. Thank you for the comment. Glad it helped.

[@QuincySantillan]

Hello sir, We are currently on quarantine and need to do our worksheets on our own, this video really helped me a lot. Thank you so much sir. Hope you create more. ❤️♥️

[@crowsmathclass]

Thank you for the comment. Glad it helped.

[@zjwiya]

omg ate quincy😳😳

[@_quickyerrfortnite_7835]

You are an amazing instructor. I should have came here first because you made it super easy. My son’s teacher talked for 90 minutes and it was so bad, I had to go to UA-cam to help explain to my son!

[@crowsmathclass]

Thank you. Glad it helped.

[@rykiesy1289]

I can't understand my modules then I found this. It is so helpful, thank you so much and god bless!

[@crowsmathclass]

You’re welcome. Glad it helped.

[@yunha21]

Thank you! You have saved my life!!

[@crowsmathclass]

You’re welcome.

[@sagargour2024]

Teaching math in a Country accent is a different flex😂😍❤️

[@schyler6097]

Thank you! I'm studying for a statistics final and this video really saved me!

[@crowsmathclass]

You’re welcome. Good luck on your final.

[@jvaliente9094]

Thank you steve, I need this review because I already forgot this lesson. I was on high school when I last encountered this.

[@crowsmathclass]

You’re welcome. Glad it helped.

[@zehrag8265]

thank you so much for your help!! it worked a lot on me. by the way, ı loved you voice tone its lovely. thanks!!!

[@crowsmathclass]

Thank you. Glad it helped.

[@briannamarie2666]

wow thank you your videos really helped me

[@crowsmathclass]

You’re welcome. Glad it helped.

[@diamond_3448]

I know I’m late, but you have helped me understand in minutes compared to my professor's 40-minute audio, and I still didn’t understand. You show the problem and explain it in steps. Thank you so much.

[@crowsmathclass]

You’re welcome. Glad it helped.

[@graciemaeleodones7358]

THANK YOU SO MUCH YOU'RE REALLY A LIFE SAVER!!

[@crowsmathclass]

You’re welcome.

[@celiabonghanoy2140]

Thank you sir. This really helps me a lot with my homework 👍🥰

[@crowsmathclass]

You’re welcome. Glad it helped.

[@realmathinaminute]

I'm a math teacher. I really appreciate your videos! They are clear and so well done. You are a great teacher.

[@crowsmathclass]

Thank you.

[@eireenruhinda8888]

Very good i understood. God bless you

[@crowsmathclass]

Thank you. Glad it helped.

[@calongealvinjayl.6780]

Thank you for this professor 😊😊 it's 2021😂😂

[@crowsmathclass]

You’re welcome.

[@nurjannahabdulwahab461]

Thanks Sir , you made my math✌️ 🇵🇭
I sweart it will helpful

[@crowsmathclass]

You’re welcome. Glad it helped.

[@prakhar3134]

how can i go about finding the area under curve for a z value that is not present in the table. i tried calculating it using the cdf of std. normal function but encountered the erf() during the integral and i dont know how to calculate the value of erf(x). pls help

[@besavilla5007]

Keep up the good work sir, A very helpful video

[@crowsmathclass]

Thank you. Glad it helped.

[@Comsieph]

This really helped thank you so much

[@crowsmathclass]

You’re welcome. Glad it helped.

[@anjalidissanayaka2785]

I'm sinhala....but understand very well🔥❤

[@jhonfernanmadolid2324]

instead of P(z ≤ -1.32) make it P(z ≥ -1.32), since z = 0.

[@rexsumalinog8781]

How about between two negatives like between z=2.06 and z=0.54?

[@crowsmathclass]

It’s the same. Look up the larger minus look up the smaller.

[@rabekawilson6232]

I NEEDED this video so bad! Thank you for making it, I understand the material better and I cannot thank you enough. Hope you have a good one!

[@crowsmathclass]

Thank you. Glad it helped.

[@orionraizel]

I got lost when its comes to, , ≥ and ≤, when will i use them
Please help

[@GurameMoiya]

Thank you, very helpful

[@crowsmathclass]

You’re welcome. Glad it helped.

[@roxanneloubalidio7509]

That was very helpful and well explained. Thanks, Steve!

[@crowsmathclass]

Thank you. Glad it helped.

[@Mckle]

the drawing of how you need to subtract -2.33 from 1.78 connected the wires that were unplugged. thank you so much

[@crowsmathclass]

You’re welcome. Glad it helped.

[@KavenLeandro]

Why anybody makes an example of just using a one sign table to an excercise of numbers in between with different signs (ie z negative to find z=-0,77 to z=2,31)?

[@donaminta]

no one teaches how to do this without the z table, which my class isn't using and i forgot how to do it on the ti-84 😭😭im gonna fail stats pray for me

[@crowsmathclass]

You can do it. Just practice practice practice. Good luck in your class.

[@tubeprincessamirahtv7993]

Do you have a video on Find the indicated area under the standard normal curve.
To the left of z equals - 2.45 and to the right of z equals 2.45

[@pat6017]

Thanks

[@crowsmathclass]

You’re welcome.

[@IMRANNAZIR-f6q]

Thank you man!!!!!!!!

[@crowsmathclass]

You’re welcome.

[@haripriyabhoi4492]

Nicely explain sir, I was tried last 15 days above, your vedio is helpful for me

[@crowsmathclass]

Thank you.

[@KM-lf5be]

Thank you so much for your explanation. Very clear and easy to understand. Really helped me a lot.

[@crowsmathclass]

You’re welcome. Thank you for the comment.

[@kassandrahuyo-a-xp7yr]

Sir what if, if the given is bounded by z=2.25 and z=1.00?

[@crowsmathclass]

Look up 2.25 and then 1.00 and then subtract the two areas.

[@chrisleephileguana5886]

Thank you.... very helpful video....

[@crowsmathclass]

You’re welcome. Glad it helped.

[@ivangilepo8549]

How to know if I will use greater and equal and lesser and equal.

[@crowsmathclass]

The problem tells you.

[@wtforsaken.]

How do I graph if it says "at most z"? Thanks in advance..

[@crowsmathclass]

Same a less than.

[@Hannieheyy1004]

I know this was years ago, but aren't you supposed to add the z-values of -2.33 and 1.78 to get the area between them? Since the values on the table are the area between 0 and the 1.78 and 0 and -2.33?

[@crowsmathclass]

If you are using that type of table. This table reads the areas to the left of the z vale. I have a video that shows examples using both tables. The link is below.
ua-cam.com/video/BItUZISCkpo/v-deo.html

[@Hannieheyy1004]

@@crowsmathclass wow, thank you! I've been confused why there are different z-tables with different values. Thanks a lot!

[@happybaby7839]

How about a P(z=x) x being a number. How would you do that?

[@crowsmathclass]

You would have to convert x to a z value. If I understand your question.

[@wu.i.86k]

what if the z scores i more than 3.4 like -4.4?

[@crowsmathclass]

The tables will usually tell you to use 1 if more than 3.5 and 0 if less than -3.5. To get an accurate value you would need to use excel. You can search my channel for Norma distribution using excel.

[@brittanynguyen8756]

This was very helpful. Thank you!

[@crowsmathclass]

You’re welcome.

[@fmartinez004]

Sloppy mic noise

[@vyris2884]

Thank you, you explained way more in depth than my teacher 😭

[@crowsmathclass]

You’re welcome. Glad it helped.

[@luke1stars1masher]

Thank you. Can't believe I pay 600 dollars a course just to have to watch a fucking random video on youtube to understand something. Fyck college, but thank you.

[@crowsmathclass]

You’re welcome. Glad it helped.

[@atavierreed2267]

Thank you so much 👍

[@crowsmathclass]

You’re welcome.

[@randyobas9819]

Thankyou this video is very helpful.

[@crowsmathclass]

You’re welcome. Glad it helped.

[@Hitori-chan1]

Why do you sir not add .5 after locating the area?

[@crowsmathclass]

That is when you are approximating a binomial distribution using the normal.

[@Hoswevlogs]

What application you are using?

[@crowsmathclass]

One note.

[@estheq5394]

Sir how about
1. Above z= 0.57
2. Below z= -1.43
I dont get this? Can you help me sir?

[@crowsmathclass]

Above means to the right and below means to the left.

[@estheq5394]

@@crowsmathclass thankyou so much!!

[@crowsmathclass]

You’re welcome.

[@michaelkabera1258]

very helpful. i now get it.

[@crowsmathclass]

Glad it helped.

[@junnielvistal3850]

Can we have a link about the table please? So we can download

[@crowsmathclass]

It is the table from my book. You can google z table and just print one. They r all pretty much the same.

[@elginmonty]

I finally got it!! Thank you for the detailed explanation!!

[@crowsmathclass]

You’re welcome. Glad it helped.

[@2012akd]

WHEN D0 Y0UN KN0W WHEN T0 SUBTRACT 0R ADD THANKS IN ADVANCE

[@louni9112]

👍

[@rythe7848]

Hi sir, what is the name of the app you're using(notebook)

[@crowsmathclass]

One note.

[@rythe7848]

@@crowsmathclass good morning sir, where did you get those notes? i badly need it for my math class

[@anjalidissanayaka2785]

🔥❤

[@idiotic.4725]

Very helpful because our instructor is not teaching us through online class, so I don't under any of that numbers, thank you for teaching I understand it all now

[@crowsmathclass]

You’re welcome. Glad it helped.

[@michaelfitzpatrick3061]

Thanks helped heaps! Great explanation!

[@crowsmathclass]

Thank you. Glad the video helped.

[@Plebus3]

thank you steve, missed my stat class last week. failed to be a good student for that day but your video helped me study the content i missed so im ready for the exam.

[@crowsmathclass]

You’re welcome. Glad it helped. Good luck on your exam.

[@cristoperjr.g._ababon817]

Ahh I dont have any table ffffffffff

[@crowsmathclass]

There should be one in your book or you could google for a table to print.

[@glyzzajadeesogon9863]

Gosh...this saves me, thanksiee

[@crowsmathclass]

You’re welcome.

[@saleh3407]

thank you ,, very helpful

[@crowsmathclass]

You’re welcome. Glad it helped.

[@sanzidasultana709]

I got so frustrated seeing my lectures class recordings cause they didn’t make any sense and then I found you! Thank you so much for this video. May God Bless people like you.

[@crowsmathclass]

You’re welcome. Glad it helped.

[@maritestv7664]

omg thankyouuuuu☺️🥺❤️❤️

[@crowsmathclass]

You’re welcome.

[@yaduraj8559]

Thank u so much for explaining this topic in simplier way💯💯

[@crowsmathclass]

You’re welcome.

[@yellzzy]

Watching from the Philippines. Thank you so much, now I can solve my assignment. And share this video to my Friends and classmates.

[@crowsmathclass]

Glad it helped. Thank you for sharing.

[@enzoc3869]

Do you always subtract from 1? Let’s say you have a chart with a different area shaded

[@crowsmathclass]

There are different charts. Search my channel for How Read Two Different z-tables.

[@crowsmathclass]

ua-cam.com/video/BItUZISCkpo/v-deo.html

[@redchard4906]

thank you very very much

[@crowsmathclass]

You’re welcome.

[@imfabio217]

can you tell me how to know whether to subtract the area from 1 or 0.5 or add

[@crowsmathclass]

It depends which z table you are using. Here is a video showing how to read the two different z tables.
ua-cam.com/video/BItUZISCkpo/v-deo.html

[@imfabio217]

@@crowsmathclass thank u so much💕
I got it now😁

[@crowsmathclass]

You’re welcome.

[@elizapalermo4378]

I don't get it, how come the table im using is different from yours

[@crowsmathclass]

You are probably using a different z table. Here is another video I made on how to read the two different z tables.
ua-cam.com/video/BItUZISCkpo/v-deo.html

[@elizapalermo4378]

@@crowsmathclass thank you

[@crowsmathclass]

You’re welcome.

[@edepcristinefeyeb.2258]

If the area to the right of +Z is 0.0329 how to solve this?

[@crowsmathclass]

1- whatever the table says.

[@onixq9202]

Thank you very much

[@crowsmathclass]

You’re welcome.

[@pieces0fsheets352]

thankyou very much

[@crowsmathclass]

You’re welcome.

[@nyejalchancy7397]

This video was very helpful, I never thought I would be able to understand this concept. Thank you!!!

[@crowsmathclass]

You’re welcome. Glad it helped.

[@alfonsorolandjosephd.8531]

how to find z scores?

[@crowsmathclass]

ua-cam.com/video/FzWdZGMae3k/v-deo.html

[@mcdonalds1599]

THANK YOU SO MUCH I'M ANSWERING NOW THE LAST MINUTE AND YOU MADE IT VERY EASY.

[@crowsmathclass]

Thank you. Glad it helped.

[@kellyl2794]

Great thank you!

[@crowsmathclass]

You’re welcome.

[@gabrielaturcios5064]

i never comment but god bless you, seriously ive been trying to understand this all morning and 5 minutes in and i already got it. Hope youre having an amazing day ;-;

[@crowsmathclass]

Thank you for the comment. Glad it helped.

[@saaarahism]

Another UA-cam tutorial saviour!! Thank you!!

[@crowsmathclass]

You’re welcome.

[@insurgentgaming2676]

Sir what app is that?

[@crowsmathclass]

I am using one note.

[@simranjeet8816]

Thank you so much. I have an assignment to do in 3 hours and your video helped a lot….

[@crowsmathclass]

You’re welcome. Glad it helped.

[@sakshi.nairrr]

THANK GOD FOR YOU

[@edjovenlucero8887]

thnks it helped

[@crowsmathclass]

You’re welcome.

[@nelsontan5069]

thanks a lot sir

[@crowsmathclass]

You’re welcome.

[@makban_fun_classroom4975]

So clear. It was very helpful. Thank you sir

[@crowsmathclass]

You’re welcome. Glad it helped.

[@arabindasamantaray1059]

The best

[@crowsmathclass]

Thank you

[@dennisestrera2865]

Thank you😍

[@crowsmathclass]

You’re welcome.

[@melanie6104]

Thank you 💖

[@crowsmathclass]

You’re welcome.

[@goldenchildofra6432]

Thank you, this video was very helpful in grasping the concept.

[@crowsmathclass]

You’re welcome. Thank you for the comment.

[@jenilyncabatin7083]

Thankyouuuu

[@crowsmathclass]

You’re welcome.

[@andriodgamer5935]

Thanks sir

[@crowsmathclass]

You’re welcome.

[@tabithaneema2270]

Thankyou

[@crowsmathclass]

You’re welcome.

[@jehwotetsuro7462]

Thank you, sir. This video is very helpful

[@crowsmathclass]

You’re welcome. Glad it helped.

[@saminaa6802]

Thank you soo much! Finally I understood this topic. Thank you for your work!

[@crowsmathclass]

You’re welcome. Glad it helped.