thanks for taking the time to put this together - guys like you make the world a better place by freely making education available to the masses for free - you rule!

I love how you did it multiple times. Its 1 million times better than other vids when they just show you once. This really gets it through your head.

whos here for tomorrow's exam

this is honestly what I look for in a online math video , no rambling... you nailed it.

After hours of laboring, and countless youtube videos, I finally got one that broke it down in bits and pieces. For one who is coming from a not too sound mathematical background, this video has been a life saver in understanding normal distributions. I'll now go ahead and tackle probability with this new found knowledge. Muchos gracias!!!

Way easier to understand than my stats prof

Straight forward, simple, no unneeded explanations. Just what I was looking for. Thank You

For those of you who have different charts, you're suppose to subtract the z-scores from one another instead of adding them like he does. For example, with the second problem: If you look at your chart and get .02275 for -2.00, and .97725 for 2.00; SUBTRACT them. When you subtract .02278 - .97725, you get 95.45. It isn't 95.44 but its close enough... I did the same thing with the first problem. I got z-scores .15866 for -1.00 and .84134 for 1.00. When I properly subtracted them, I got 68.26.

so much clearer and easier to understand than coming from an old PhD professor....and the book. needless to say what i spent hours trying to comprehend I easily learned by watching this video twice. No bs. straight to the point. How teaching should be.

My teacher was explaining this to the class for around 2 classes and most of us didnt get it. This video is the best!

clear as hell, i was doing CFA level 1 test and struggling with normal distribution! your lecture is amazing.. it helps a lot, thx buddy

This is a miracle. I didn't get this until I watched your video and my final is tomorrow morning. XD thanks for sharing!

Seven years later, a random Turk from the Netherlands comes by, learns what the system didn't want to provide, or assumed we already knew, and leaves again. Thank you for putting this here. Out of all the videos out there, only yours helped me out.

Thank you! This makes so much sense. My book made is seem like greek! Please post all of your teachings! Teachers like you make the world a better place.

I was in a 3 hour lecture at uni not being able to understand it at all and you explained it in 10 minutes.... impressive ! Thank you so much.

Thank you so much for keeping this video concise, simply and straightforward. The hours I have invested in this week only, by being at Uni have tested my sanity in regards to normal distribution. It is now getting synthesise in my being slowly but surely. My lecturer, oddly enough commented on how many tabs I had on my laptop when helping me with something , little does she know I have spent about an hour and a half just searching through videos on this subject….I wish I had found this earlier . It just shows you the algorithm is truly watching your moves…. Just think about that for a moment. Thanks again for your generosity.

You're a life saver! Been studying for final and was having issues until watching your video. THANK YOU.

I have my first math exam in two years tmrw and doing the textbook problems had me so stumped. I'm solving these with you and pausing so I can test myself and beat you to the next step. I'm nailing all these and feeling way more confident about not only solving the problems but also about the logic behind it all. Thanks so much for this great video :)

Just wanted to say thank you! I'm in beginners Stats class and could not figure a certain problem out...random person scoring above 65%. Your instruction on IQ of greater than 130% helped me out! Thanks again!!

This professor is so awesome that Majority of people can understand Z score calculations within 10 minutes :)

LOVE how simple and to the point, you make this!

you made this so easy to understand in 10 minutes when my teacher spent 1 hour trying to figure out how she did it the first time... Thank you so much

This was amazing. I finally get z scores. I love the fact that you went step by step and gave several examples. Nicely done

finals in about 2 hours and you made more sense in 10 mins than my lecturer in 3 months - thank youuu

thanks so much. learn more in this ten minutes than class for the last two weeks

My poor head don't understand the concept yet , but after strolling dozens of videos , your video game high hopes , thank you , i like the steps you go through, my professor is like a hurricane !!

THANK YOU SO MUCH. I have a college class certification due in 4 days and this really helped me understand bell curves and standard deviation with percentages. You rock!

Thanks for not talking too much and making it sound so easy/simple!!!

Finally! an explanation that makes sense!. thank you so much! i've spent hours trying to figure this out and you did it in 10 minutes.

you explain it very concisely and it's straight to the point. It's helped me tremendously. Thank you. I think, learning the symbols that correspond to this language are the hardest part when understanding this concept. Also, it's essential to understand the formula when solving these problems. My Professor didn't explain it so I understood it or didn't take the time. Your online video shows all this in an easy to understand format. Keep up the good work in helping people work through challenging concepts in an easy manner.

I now feel that I may actually pass this unit. Thank you so much for taking the time to make this video.

This has to be 1 of the best video out there on Zscore...thanks

Thank you so much for the most simplest breakdown ever!!!!!! I wish you taught at a college near by my residence. Thank you

omg hes saved my life! i was freaking out about my exam coming up

Thank you so much! My final exam is in 30 mins and you’ve made this really clear for me!

I know this video was uploaded literally 8 years ago, but now it all makes sense and I’m going to pass my standard

Americans are the most Generous People on the planet top education for free. I never meet people like you here in Germany I love America. clear and very helpful

thank you so much. this video has helped me heaps. i didnt understand this at all until i watched this. great information

My instructor is incredibly bad. He rambles, starts and stops at odd points, and generally makes no sense. He does a poor job of relating the information he's spewing out to what it actually represents, and to top it all off, he wrote his own text for the class which makes just as much sense. I had no idea how to do my homework. Class has been in session for almost a month. By 7:47 in this video, you've already managed to teach me more than he has thus far this semester. I can't thank you enough for posting this.

you are genius...at least for for me .. you are between those very tiny percentage of people who can explain this in such a easy way ... God Bless

The most easy and useful in all KZfaq videos of normal distribution thank for easy explanation ready for exams now

I can't believe it's that simple!! Thank you so much for making my life easier

This video is absolute genius! Thanks so much, you made it just so easy to understand

this video was so helpful! thanks for doing multiple examples with different problems!!

OMG THIS IS GOOD THANK YOU FOR SAVING ME OF MY SCREWED UP LIFE. MY EXAM IS IN LESS THAN 12 HOURS

This topic can be really difficult the first time learning them, but once it clicks (Which can take a while), it's not so bad. You seem to help it click a lot more quickly than it otherwise would!

thank you, this helped so much. i can not explain how glad i am i found this video

you explained what my professor (who has a phd and whos been published dozens of times) could not. Sir, I tip my hat to you, and id like to buy you a beer (if your ever in the area). Many thanks.

Great tutorial. This really helped me to understand normal distribution and z graphs.

Bless your soul Man, you just saved me

This video has really helped me. Thank you for putting it up.

life saver thank you for this video because my teacher in statistics get mad on us then he told that he is going to have a quiz but he didnt discuss this very well

Thank you sir! I was trying to learn this from the text for the last hour.. you made it so much easier!!

BEST EXPLANATION OF THIS TOPIC! THANK YOU SO MUCH

Thankyou for the video, it really helped to how this precisely and clearly

Is it too much to ask for additional examples? This was BEYOND GREAT and something I haven't seen that goes straight to the point!

When my teacher introduced this topic I got overwhelmed by the name, goos thing she linked your video to the classroom.

have a test tomorrow and this video just saved my life

thank you bro! i need this tomorrow for my exams

my life was missing this information. Good work!!!

Thank you so much :) I realized I should thank each video that teach well. You are one of them, Mister! Keep going :)

This has just saved me from failing stats due to having a terrible professor! Thank you so much for the video!

Thank you for explaining this so clearly!

wow...this vid makes everything so much easier and understandable,thank you!

This helped refreshed my memory! Have a final tomorrow

Finally understood how this works!!! THANK YOU SO MUCH!

Omg thank you finally I’ve been looking for a vid like this on bell curved

Best video for Normal Distribution & Z-scores.. -Thank you for this!!!

This is good stuff, well explained and very helpful. Thank you!

Thank you so much for the examples! Best video of normal distribution I've found on youtube :)

Thanks for this video. I was enlightened with the topic. Such a great help!

Thank you so so much!!!! This is the best video I have seen so far!

i finally understand how to apply the information from class. thank you so much

Excellent. This example can be replicated in any set of scores - including employee performance , Ranking of companies in revenue performance, etc.

I like this explanation. It's simplified and dummy-friendly.

Thanks, I have been looking help on this exact examples you have uploaded. You made very easy to understand probability distribution.

The percentage of dislikes to likes for this video at this moment is 234 out of 5.7K or 4.1% lying outside 2 standard deviations or 100 - 2 x 47.72 = 4.56% ! Meaning the dislikers are insignificant critics to this well-made video. Thanks pspollard1 !

Perfect! Straight to point explanation. My Professor just reads off a PowerPoint!

thank you for this ... short & straight to the point

i am here for tomorrow's midterm!!!! Thank you so much this was like a revelation i finally get it! lmaoo

Very nicely presented - it`s all much clearer for me now - thank you!!!!

wow you helped me so much. so explain everything so clear and went step by step. thanks!

Love this you explain nice and simply that it looks so easy to understand now...Thanks mate

Thank you sooooo much! This makes a lot more sense than it did in class.

Thank you very much for your explanation! It helped me a lot to understand better the normal distribution!

FINALLY UNDERSTOOD THIS THING!!! THANK YOU

You are a life savior Sir

Really great explanation. I wish I would've seen this video before I crashed and burned on my test :/ But thanks for putting this up. Super helpful!

Thank god for you. I fully appreciate the clarity.

How come the Z table I was given in class is different ? at 1.00 on my Z tableI have .8413

Thanks so much. I have been looking for help on this for like an hour thanks again

This guy is so good and I'm learning this stuff in my sophomore year

thanks a lot for the video, it helped me to gain better understanding on the subject

i have an exam after 3 hours about this .. i am very thankful for u

This is excellent video..i got full of knowledge about normal distribution through this video.. thank you very much

This is like the only thing I need to review for my test today.

This really helped me out a lot in college stats I. Thank you!!!!!!

I search lots of videos but finally I got it ...thank u. So muchhhh

I have an exam in 1 day and you literally saved me.

Excellent work. The only confusion might arise from calling the table data that you look up “distances” when they are actually the AREA under the curve. You do say area in the example where you have to subtract it from 0.5 to determine the “greater than” AREA. For those of you with the double data values, you4 chart is giving the area between the -x and +x value of the z score.. so it’s double the area.