Normal Distribution: Calculating Probabilities/Areas (z-table)

Поділитися
Вставка
  • Опубліковано 11 січ 2025

КОМЕНТАРІ • 1,3 тис.

  • @tanyaloki3751
    @tanyaloki3751 5 років тому +1578

    You taught me in 5 minutes what my teacher couldn't in 4 hours. Thank you!

  • @kyliesmommy84
    @kyliesmommy84 2 роки тому +147

    6 years later, you’re still explaining what my professor can not! Thank you, thank you, thank you!!!

    • @fupiuganda7025
      @fupiuganda7025 Рік тому +2

      How do u get the 0.02 there up

    • @EphraimMense
      @EphraimMense Рік тому +1

      I have a question. After finding our Z for example, his first exercise it was -1.2 so according which criteria should we choose 0.02? in order to find its region. I'm confused I need explanation please. Thank you

    • @susannah8342
      @susannah8342 8 місяців тому

      ​@@EphraimMenseThere are 2 decimal places in -1.22. The first decimal place is 0.2 which is included in -1.2 and the second decimal place is 0.02. Hope this helps!

    • @EphraimMense
      @EphraimMense 8 місяців тому

      @@susannah8342 Thank you!

    • @beingbachelor
      @beingbachelor 5 місяців тому

      He explained well,got after 12 years

  • @copperwater8456
    @copperwater8456 4 роки тому +181

    This is the first time I've ever fully understood this. Holy shit why can't all teachers just explain it like this...

    • @sohandandekar8976
      @sohandandekar8976 4 роки тому +3

      I don't think if this is the first video you are watching you'll understand the concept. I also loved the video have given my thumbs up. But this was a revision for me. I had learnt this earlier, 2 years back.

    • @Hmbemaisidro
      @Hmbemaisidro 4 роки тому +9

      Agree simply because your teacher already introduce the lesson that helps to understand this video lesson better so better appreciate your teachers effort🙂

    • @zainali7157
      @zainali7157 3 місяці тому

      Hi 😂

  • @zahidhashim6902
    @zahidhashim6902 3 роки тому +32

    this deserves million of views. Thank you for explaining something in 5 minutes which my teacher and other youtube videos could not explain in hours.

  • @adarsshsr9892
    @adarsshsr9892 9 місяців тому +690

    For those who came here with their exams tomorrow

    • @grocklover9904
      @grocklover9904 9 місяців тому +4

      😂😂😂😂

    • @awesomebush8711
      @awesomebush8711 8 місяців тому +10

      In 11 hours lol

    • @gokulks6752
      @gokulks6752 8 місяців тому +16

      Today, in 3 hours time

    • @awesomebush8711
      @awesomebush8711 8 місяців тому +1

      @@gokulks6752 how did you do?

    • @gokulks6752
      @gokulks6752 8 місяців тому +2

      @@awesomebush8711 they gave a couple of values (not Z score) and asked to find mean and variance, not the way I prepared sadly. I messed up. But I did answer the other parts, so I'm confident I will pass. How did yours go??

  • @rf1170
    @rf1170 6 років тому +33

    Not only is this an accessible explanation, the production of the video is top-notch, too! Thank you for sharing it.

  • @glizzard1894
    @glizzard1894 4 роки тому +46

    Thank you sir! Finally a simple explanation in plain language! I won't lie. I've cried more than once this semester because of college stats. This video is a relief. You have a wonderful ability to convey a difficult concept. I assume you are a teacher. If not, you should be. You're a natural at this.

  • @fatinistiaque5892
    @fatinistiaque5892 7 місяців тому +4

    This is how actual statistics classes should be! Precise and simple. Watching this video clears my concept every time!

  • @ericathomas1095
    @ericathomas1095 5 років тому +238

    taking a stats exam tomorrow.. i couldnt grasp this concept until i watched this video, thank you so much it was very clear and informative

  • @DIFUSION_TV
    @DIFUSION_TV 5 років тому +16

    this is absolutely perfect. Couldnt remeber this for like 3 years, and suddently it came back at me. thank you very much

  • @MuajjamMurad
    @MuajjamMurad Місяць тому +3

    You taught me in 5 minutes what my teacher couldn't in 4 class. Thank you!

  • @avrodipbiswas7293
    @avrodipbiswas7293 2 роки тому +6

    You're a life saver. I was stuck with this problem for last three hours! And you just revealed it within such a short time!!!

  • @ahmedabdelnasser175
    @ahmedabdelnasser175 4 роки тому +10

    As an AI student, I've been suffering from this for months, you made it alot easier for me. Thanks a lot!

  • @kugisaki2675
    @kugisaki2675 Рік тому +2

    I'm in my shs now, and I don't understand what my teachers said. It's not that I hate him but my learnings depend how good the teacher teach and I don't get anything from him at all. And it leads me here, thank u so much!

  • @sk-or4sz
    @sk-or4sz 5 років тому +4

    Got my Stats test tomorrow and your videos are a Savior. Gracias!! :)

  • @lovelylionlovelylion3664
    @lovelylionlovelylion3664 Рік тому +2

    THANK YOU SO MUCH!!! MY EXAM IS TOMORROW AND YOU TAUGHT ME BETTER IN 5 MINUTES THAN MY TEACHER IN A WHOLE WEEK! THANK YOU AND MAY GOD BLESS YOU!

  • @Ada-ld6cc
    @Ada-ld6cc 3 роки тому +24

    Thank you so much! I’m in eighth grade and I didn’t understand this lesson since we were only given worksheets and left to understand it alone. This really helped. I checked other videos but it made me confused more. While this literally helped me understand and helped me what the tables are for. Now I can finally answer my assessment and enjoy summer vacation☺️

  • @agentstona
    @agentstona 3 роки тому

    THE BEST tutorial ever ..... beats my crappy university lectures who spend hours and this guy manages to teach it GRACEFULLY and perfectly in 5 minutes . THANK YU

  • @TheInspired79
    @TheInspired79 3 роки тому +7

    I just read the whole chapter in my textbook. Thank you so much for this, this makes so much more sense.

  • @metanoiaganzel1327
    @metanoiaganzel1327 Рік тому +1

    After six years of your video make me smile.
    Thanks a lot and operation to Normal Distribution

  • @ATorres0821
    @ATorres0821 6 років тому +16

    Thank you very much Joshua for having demonstrated the meaning of z-scores so clearly!

  • @mamok3479
    @mamok3479 Місяць тому +1

    This guy knows how to make it easy and explain it as if he created statistics,bravo JE

  • @mazil.i
    @mazil.i Рік тому +5

    A simple thank you won't be enough to say how much this video helped me!
    Thank you a million times!

  • @dangduc88
    @dangduc88 4 роки тому +1

    Thank you thank you a lot. Your video in 3 mins equals my teacher 1 hrs.....

  • @SunDown617
    @SunDown617 2 роки тому +4

    Ive been struggling with the z-table and you just made it feel so much easier in 5 minutes. Thank you so much

  • @xiaoqingtian6542
    @xiaoqingtian6542 8 місяців тому +2

    Your video for normal distribution is the BEST one. Within 5 minutes I got everyting.

    • @joshemman
      @joshemman  8 місяців тому +1

      Glad to hear that! Thanks.

    • @ttgvelu4842
      @ttgvelu4842 Місяць тому

      Great explanation within 5 min understand clearly thank u for teaching ​@@joshemman

  • @xx_beleza_xx
    @xx_beleza_xx 5 років тому +9

    This is amazing, I even had to leave a review. Keep on doing such tutorials, it really helped. Thank You so much

  • @panaceachikonye909
    @panaceachikonye909 2 роки тому +2

    You taught this in 5 mins ....wow bravo

  • @shrutisanghavi8137
    @shrutisanghavi8137 2 роки тому +4

    I am studying for the National Board Certification for aya math, and this was an excellent tutorial. Bravo!

    • @EphraimMense
      @EphraimMense Рік тому

      I have a question. After finding our Z for example, his first exercise it was -1.2 so according which criteria should we choose 0.02? in order to find its region. I'm confused I need explanation please. Thank you

  • @Yeim0_richard
    @Yeim0_richard Рік тому +1

    I don't know how to show up my thanks to this person, because this video is greatly helpful for me as a statistics student. Thank you so much!

    • @joshemman
      @joshemman  Рік тому

      Thanks for dropping a line. Much apprecited.

  • @sunshinedesignsandmore4074
    @sunshinedesignsandmore4074 5 років тому +5

    OH MY!!! THIS WAS AWESOMELY AMAZING!!! I've been doing this statistics for 4 weeks now and this is the only time I get it after watching this video. THANK YOU!!

  • @sophiasharlene3191
    @sophiasharlene3191 2 місяці тому

    A 5-minute explanation for what took me weeks to understand.
    Subscribed!

  • @peachlife5118
    @peachlife5118 6 років тому +1336

    Who else is doing stats homework??

  • @doublev7642
    @doublev7642 4 роки тому +11

    Sir, you are a lifesaver! Thank you for this informative, and concise lesson.

  • @ArniMuras
    @ArniMuras Рік тому +3

    thank you so much, sir...I was studying the whole day looking for this simple part that you made clear... especially your summary.

  • @abolvaiuma7809
    @abolvaiuma7809 2 роки тому +3

    This 5min video is really helpful. Short and clearly explained. Thanks🙏

  • @JGratsch
    @JGratsch 5 років тому +4

    Thank you for these videos-they are extremely helpful and well thought out - and your voice is very calming. You’ve helped me several times and I greatly appreciate it.

  • @deanemilne6275
    @deanemilne6275 4 роки тому +3

    you explained the reasons why we need Z scores, this was very useful!!. Many videos don't explain this. Well done

  • @josephmwilu6917
    @josephmwilu6917 2 роки тому +41

    Who else has a test in a couple of hours?

  • @ojehani
    @ojehani 6 років тому +3

    This video was extremely helpful, step by step instructions in a very well presented video. Thank you very much Joshua!

  • @norahwere8977
    @norahwere8977 3 місяці тому +1

    This is funny! Found Joshua again! Operation mgt (linear programming ) to Stats Methods in Business (Calculating probabilities), am so happy. Quick feedback, I got 80% on my first quiz on linear programming and am so grateful to have watched your channel. I believe that I will equally do well on stats meth. Thank you!!!

    • @joshemman
      @joshemman  3 місяці тому

      Glad to hear 🎉. Thanks for the feedback, Norah.

  • @stupidbatrx
    @stupidbatrx 2 роки тому +4

    Clearly explained / no nonsense. Thanks man!

  • @jungkookiee6250
    @jungkookiee6250 3 роки тому

    Perfect...Just absolutely Perfect!!.... This was all that I needed to know. This again proves that UA-cam videos are better than University lectures!

    • @rdgamesdrip
      @rdgamesdrip 3 роки тому

      2:10 do u know why it is 0.02 instead of the other numbers pls help :(

  • @026martin
    @026martin 4 роки тому +5

    Needed a refresher course in stats for a computer class. This was one of the clearest and concise explanations I have encountered. Thank You!

  • @trever5483
    @trever5483 4 роки тому +1

    after watching around 30 hours videos finally get into idea by help of this blessing man thanks mate

  • @salarhussain7273
    @salarhussain7273 5 років тому +15

    Damn bro
    You nailed it in 5 min thanks

  • @Paladin_Rush
    @Paladin_Rush Місяць тому +2

    Timestamps (Powered by Merlin AI)
    00:03 - Using standard normal tables to calculate probabilities.
    00:56 - Understanding standard normal scores and using cumulative tables for probabilities.
    01:29 - Calculating probability for x less than 54 using z-scores.
    02:12 - Understanding z-scores and corresponding probabilities in normal distribution.
    02:52 - Calculating probabilities in a normal distribution using z-scores.
    03:29 - Calculating probabilities using z-scores in normal distribution.
    04:16 - Calculating probabilities using z-values involves area subtraction.
    04:55 - Calculating areas under the normal distribution using a z-table.

  • @stk57thst
    @stk57thst 4 роки тому +4

    Prepping for my FE (other disciplines) and this is perfect explanation! Thank you.

  • @erin2150
    @erin2150 4 роки тому

    Best video on z scores... not gonna lie what I tried to learn all semester I learned from this video the best the day before my final. Thank you!

  • @husseinayesufu9725
    @husseinayesufu9725 5 років тому +8

    The way God bless you for this perfectly explained video eh. Thank you very muchhhh!!!

  • @gaarafan14thedarkknight63
    @gaarafan14thedarkknight63 6 років тому +1

    You just saved a first-year college student with this wonderful explanation. Thank you so much!

  • @yo7875
    @yo7875 Рік тому +2

    Comment number 1000 :
    Thanks a ton man...I was really struggling hard with this topic and you explained it superbly in just 5 mins🤧🤧
    You are a savior 🔥🔥❤❤

  • @jpejoejoe9802
    @jpejoejoe9802 Місяць тому +1

    Here is my favourite channel for learning math , since our school ppt didint teach many hints in the ppt. Thanks for helping

  • @elainebustos1695
    @elainebustos1695 2 роки тому +5

    easy to understand, straight to the point. thank you so much for this. wish you were my professor, haha

  • @BoZhaoengineering
    @BoZhaoengineering 4 роки тому

    My god, your teaching in 5 minutes far better than my teacher did in half semester. Thank you! excellent! I learnt more from you than from my class.

  • @julianrodriguezrojas5188
    @julianrodriguezrojas5188 4 роки тому +4

    Really happy that this video exists and that everything is explained well and quickly, thank you!

  • @agneskayange2804
    @agneskayange2804 2 роки тому +1

    Who is like you in stats! understanding in few minutes! I like your tutorial so much!

  • @lilianlebednick1625
    @lilianlebednick1625 4 роки тому +3

    This video helped me loads. Thank you so much for making the lesson very clear and simple.

  • @hopskotchbamf
    @hopskotchbamf 2 роки тому

    You literally just saved my Statistics grade. This video clarified so much for me. Thank you!!!!!!

  • @karencastelino1793
    @karencastelino1793 4 роки тому +3

    You're a legend mate! Thanks for this!! Really helpful!

  • @kristinparker7719
    @kristinparker7719 3 роки тому +2

    You saved my grade! Thank you for your video and your willingness to break it down so simply!

    • @EphraimMense
      @EphraimMense Рік тому

      I have a question. After finding our Z for example, his first exercise it was -1.2 so according which criteria should we choose 0.02? in order to find its region. I'm confused I need explanation please. Thank you

  • @anime4lifejosef868
    @anime4lifejosef868 6 років тому +4

    Love you no Homo. Thank you so much
    Best tutorial so far. It's clear, simple, short and useful.
    YOU SIR ARE A GENIUS 😊

  • @mayurdhage2478
    @mayurdhage2478 3 роки тому

    Probably the best explanation for finding the z-scores from z tables on the internet!

  • @asadmohammad6938
    @asadmohammad6938 6 років тому +5

    Thank you so much for the great video!!! I sincerely appreciate your effort and clarity in explaining the concepts :)

  • @rosehoney4974
    @rosehoney4974 3 роки тому +2

    What a great explanation! Clear concise and to the point. Really admired you.Thank you soooo much.

  • @sahelanthropus4225
    @sahelanthropus4225 2 роки тому +5

    Obviously been years since you posted this but thanks so much for a incredible learning resource. extremely helpful!

    • @joshemman
      @joshemman  2 роки тому +2

      You're very welcome!

  • @jaze9451
    @jaze9451 Рік тому +1

    So simple and easy to digest! Incredibly smart teaching

  • @hudaswift5744
    @hudaswift5744 7 років тому +35

    The person who disliked is prolly a gangster by now...this explanation is a true blessing!

  • @rishabhjain1031
    @rishabhjain1031 5 років тому +1

    Explained in lucid manner . Really thank you for this wonderful tutorial. Love from India..

  • @outofcontrol2441
    @outofcontrol2441 5 років тому +3

    I think that there is a mistake at 3:39 as the problem says AT LEAST in which the sign should be greater or equal than 80, right?

    • @joshemman
      @joshemman  5 років тому +1

      You're right. However, in continuous distributions, there is no distinction between > and >=.

  • @priyankathakur964
    @priyankathakur964 4 роки тому

    Quickest Explained!. Read 4texts but couldn't get it, until now. Thanks Dude, Great work, Please keep making videos.

  • @danieldunbar8482
    @danieldunbar8482 7 років тому +3

    Joshua thank you for this wonderfully simply but extremely informative video

    • @aqsamughalaqsi7935
      @aqsamughalaqsi7935 5 років тому

      well explained sir tomorrow is my paper and ur teaching style clear my confusion thanks alot😍

  • @briankemboi3496
    @briankemboi3496 3 роки тому +1

    Absolutely Understood Sir....had been struggling to..From Africa Kenya..be blessed👍

  • @Ernesti...
    @Ernesti... 10 місяців тому +9

    Whos watching at 2024 at this time at march? Me gonna watch it

    • @Zenamv8
      @Zenamv8 8 місяців тому

      Watching in april😂😂

  • @samsonisaac3476
    @samsonisaac3476 Рік тому +1

    This is the best video I've seen so far, thank you!

  • @ninja4216
    @ninja4216 8 років тому +7

    Nice video, very informative. Helped me a lot for the exam review

  • @niggin9271
    @niggin9271 2 роки тому +1

    Thank you mister , this was helpful. God bless you and your family.

  • @rg_nald6894
    @rg_nald6894 5 років тому +5

    5minutes 20 seconds for what my lecturer couldn't explain for almost 2 weeks

  • @ironalynrubin9465
    @ironalynrubin9465 3 роки тому +1

    I couldn't believe to understand this well in just 5 minutes, thank you so much sir.

  • @kjhhhjgguvf
    @kjhhhjgguvf 4 роки тому +8

    I just got an A.....I am on my way to buy myself and you a beer

  • @jahong_liu
    @jahong_liu 2 роки тому

    took statistics 2 years ago and forget, this is so clear, thank you Joshua

  • @KhushiJain-wk2ri
    @KhushiJain-wk2ri 5 років тому +4

    Dude, totally love your accent haha!

  • @kayleighsinnott7188
    @kayleighsinnott7188 4 роки тому +1

    Thank you so much! I have been struggling on this for a week and this video explained everything in 5 minutes

  • @internationalretailcongres2860
    @internationalretailcongres2860 8 років тому +9

    aww, thank you. great explanation!

  • @EraX52
    @EraX52 8 місяців тому

    This video had a great explanation. My math teacher just talks to much and I could not understand this for months. Now, its easy, thanks Joshua

    • @joshemman
      @joshemman  8 місяців тому +2

      Glad it helped! 🙏

  • @KlaraKaze
    @KlaraKaze 5 років тому +3

    You literally saved my life!

  • @elizabethmonday3751
    @elizabethmonday3751 Рік тому +2

    You are a very good teacher ,,, thanks for this ,I really do appreciate

    • @joshemman
      @joshemman  Рік тому

      You're welcome, Elizabeth.

  • @Elizaveta_01
    @Elizaveta_01 2 роки тому +3

    watching this because I don't pay attention during math

  • @xtuutdstuxjyxyjjtx366
    @xtuutdstuxjyxyjjtx366 2 роки тому +1

    it was amazing . keep up the good work
    only if university professors could teach something that simply

  • @CoolKidOx
    @CoolKidOx 7 років тому +9

    Why did you use the column 0.02?

    • @robinkaler1091
      @robinkaler1091 6 років тому +1

      By looking at the decimal for the zscore. Since the zscore was -1.22, you use the colum for 0.02

    • @Audreyada817
      @Audreyada817 6 років тому +20

      Because the Zscore was -1.22 you find the tenths place (1.2) on the vertical values. Then you find the hundredths place of 1.22 (.02) in the columns.
      So if your z score was -1.23 then go to row 1.2 and column .03, If the z score is -1.24 then the row is still 1.2 but the column will be .04
      Hope that makes it clear.

    • @durantetest
      @durantetest 6 років тому +1

      Audrey Mendez,
      Your explanation helped me to understand why the person in the tutorial selected those particular columns. I think he did not explained that part in the video.
      You nailed it though.
      Thank you.

    • @rv8889
      @rv8889 6 років тому

      @@Audreyada817 thank you so much!! lifesaveerrr

    • @maheenfatima4707
      @maheenfatima4707 3 місяці тому

      i​@@Audreyada817In second case at least 80 why he put Pz probability eqal to 1 -P(z less then1.67

  • @rbyourfriend09
    @rbyourfriend09 4 роки тому

    You are a GOD, i couldn't understand anything untill
    i saw this video

  • @celiaalmahairi8806
    @celiaalmahairi8806 2 роки тому

    Thank you so much!!!! Your explanation beat my professor, the textbook, and every single other video I watched! And the best part is that it's only 5 minutes - and the fact that you say "zed" instead of "zee" makes me so happy :) every time I hear the letter z being pronounced as "zee" I feel like crying

    • @EphraimMense
      @EphraimMense Рік тому

      I have a question. After finding our Z for example, his first exercise it was -1.2 so according which criteria should we choose 0.02? in order to find its region. I'm confused I need explanation please. Thank you

  • @victoriamamlesewor7755
    @victoriamamlesewor7755 Рік тому +1

    thank you ...I was finding it difficult to read the z table but your video made it easy

  • @Noodlyk18
    @Noodlyk18 2 роки тому

    Thank you so much, could not grasp what the table meant intuitively until I saw your explanation, very simple and it made it stick in my mind. Really appreciate it.

  • @Unknown-lw3ux
    @Unknown-lw3ux 4 роки тому

    A very presentable video, unlike the others that they wrote and draw in computer using their mouse which make a messy video. Although they can explain well but this one is very presentable and so satisfying to learn with this kind of tutorial.

  • @frankemeli9035
    @frankemeli9035 6 років тому +1

    My God! So beautifully explained. You should be a lecturer. Thanks a lot.

  • @callmebaneen
    @callmebaneen 3 роки тому +2

    HOW PERFECTLY YOU TEACH THIS LONG LONG TOPIC IN JUST 5 MINS ✨ WOW

  • @kentoyamazaki8055
    @kentoyamazaki8055 3 роки тому

    Sir. You did a great help with my homework thank you very much . You teach better than the teachers here in the Philippines

  • @ghulammurtaza1014
    @ghulammurtaza1014 7 років тому

    this is the easiest way to explain Normal Probability on even I watched on UA-cam....
    Thank u solo much Sir