Stats: Finding Z-value Given the Probability

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  • Опубликовано: 4 окт 2024
  • Finding the z-value if given the probability (area under curve) of a normal distribution.

Комментарии • 222

  • @CaliCity10
    @CaliCity10 3 месяца назад +1

    BY far the best explanation of SHADING area when given the AREA to find Z-value. TIP: for other people i find it it EASIER for to me UNDERSTAND it like this LESS THAN means shade from LEFT side (corner) to the right side

  • @ElffieElix
    @ElffieElix 6 лет назад +157

    when a 10 minute video explains something better than your professor did

  • @amantekle127
    @amantekle127 4 года назад +4

    Not most teachers explain clearly what they are teaching but you really do. Thank you so much for that!

  • @survivalguy11
    @survivalguy11 10 лет назад +19

    This video helped me so much, thank you! I have a stats exam this coming Monday and I was struggling to understand this because my professor doesn't communicate the best way. You made it very clear and you are very well spoken! Thanks again

  • @basedland
    @basedland 5 лет назад +24

    I'm still struggling with the ones that are structured like this P(-z0

  • @marzlittle
    @marzlittle 4 года назад +6

    7 years later and poyersmath' video is still helping us. Thank you sir!

  • @cesiameza961
    @cesiameza961 8 лет назад +53

    Best explanation ever!!!! wishing my teacher could lecture like you

  • @landylafortune269
    @landylafortune269 6 лет назад +2

    In one night I learned more than I do in one week in class. Best stat video hands down. Thank you so much. Ready for my test tomorrow.

  • @knuckles267
    @knuckles267 4 года назад +4

    Amazing! You did what my professor was trying to do for 2 lectures of 3 hours each! Bravo! Thank you so much

  • @timaloveslemons
    @timaloveslemons 10 лет назад +39

    this helped me so much! now i feel stupid for making those mistakes on my last test! i will make an easy A on this final now!
    thanks!

    • @jeffreyluo5143
      @jeffreyluo5143 4 года назад +6

      soo... I know it's been 6 years but, how did you do on your finals?

  • @rae-annknapp7342
    @rae-annknapp7342 8 лет назад +9

    Thank you! your calmness is very helpful.

  • @mryup6100
    @mryup6100 2 года назад +1

    Your voice is relaxing and the visuals along with your explanation was amazing! I don't find many videos this good on RUclips!

  • @AudreyElaineMariaDaggett
    @AudreyElaineMariaDaggett 8 лет назад +15

    This made it all soooo much more simple to me.

  • @brentdelosangeles2499
    @brentdelosangeles2499 2 года назад

    I was in elementary when you made this video. This video is helping almost ten years later, thank you! *thumbs up

  • @emma147
    @emma147 4 года назад

    I have wasted so much time looking at other math videos, this hits the ball right out of the park. Thank you so much for sharing your knowledge, and teaching it so well. God bless you!

  • @egyptianlicorice844
    @egyptianlicorice844 8 лет назад +96

    "oh that's terrible" lol 4:31

    • @jumanahhusain4584
      @jumanahhusain4584 6 лет назад

      قلتلهم ايعود

    • @marmaldo3462
      @marmaldo3462 5 лет назад

      Army!! Hello and omg I'm struggling. I keep getting numbers off😅 I hate statistics since I was in high school

    • @tayyabahussain7932
      @tayyabahussain7932 5 лет назад

      Actual representation of every math student

  • @castanon76
    @castanon76 11 лет назад +1

    Great instructions! Pictures and explanation while working out the calculations are a big help! Thanks for being online

  • @pandasraawr
    @pandasraawr 9 лет назад +23

    could u do an example using this? finding b P(-b

  • @sp8571
    @sp8571 3 года назад

    I been studying this for a week and was not getting it. I watched this video and understood instantly. Thanks for explaining this with such clarity!

  • @randomsandra4039
    @randomsandra4039 3 года назад +1

    Why can’t you be my stats teacher!?? I’m an older student going back for my college degree and I have “thinks-she-doesn’t-understand-math-brain” but the way you explain it makes me de-stress and understand!!! Thank you!!!⭐️⭐️⭐️⭐️⭐️
    PS I think I just figured out that you kind of ARE my Stats teacher now!

  • @katelyneortiz6602
    @katelyneortiz6602 2 года назад

    thank you so much. your style of teaching is super calming and very understanding

  • @Lita913507a
    @Lita913507a 4 года назад

    Thanks for the video. I'm going crazy with how to define negative or positive z-values but it become simple to me now. Really appreciate.

  • @Johnny.deeeeeep
    @Johnny.deeeeeep 11 лет назад +1

    Man, you are the boss , you teach me much better than my school teacher!

  • @ntsikayezwephungwayo9861
    @ntsikayezwephungwayo9861 6 лет назад

    Thank you very much. I had never taken a statistics class on this topic but now its crystal clear

  • @PandaElly
    @PandaElly 11 лет назад +3

    this was super helpful! you taught me what i need to know in like 10 minutes than in my 2 hour lecture :) thanks!!!!!

  • @suneperera8644
    @suneperera8644 2 года назад

    felt so hopeless until i found this video..its 2 am exams are starting tmmrw and this vid was a lifesaver

  • @moviequre
    @moviequre 5 лет назад

    why can't all profs be like you!! Thank you so much!

  • @djalitanaful
    @djalitanaful 6 лет назад

    excellent video. clear voice and english. English is my 4th language, I can only understand when is accent free. thank you.

  • @carlvheerden
    @carlvheerden 6 лет назад

    Thanks so much for sharing these videos! I post them to my students to watch as it sometimes helps hearing someone else explain it as well!

  • @niyatipalparti3130
    @niyatipalparti3130 2 года назад

    awesome explanation have been navigating to different videos but this is so far best explanation !!!

  • @gazelledeleuze
    @gazelledeleuze 8 лет назад +14

    U saved my life thank u sir

    • @usamashah9903
      @usamashah9903 5 лет назад

      a piece of paper cant decide your life or future....so enjoy moments and make memories

  • @flowersintheKitchen
    @flowersintheKitchen 7 лет назад

    Thank you very much, just watched three of your videos and i feel a bit more confident taking my quiz on this tomorrow

  • @poysermath
    @poysermath  11 лет назад +1

    Yes Chara. If the probability you're looking for is not in the table, then choose the probability that is closest to it. It may be a probability slightly greater than the one you're looking for, or perhaps it's slightly less than it. Sometimes, the probability is exactly half way between two probabilities in the table. In that case, you can either choose the larger value, or you could split the difference between the two. Hope that helps!

  • @DJ-ps2wb
    @DJ-ps2wb 8 лет назад +4

    Awesome teaching! Saved me from dropping my class!

  • @nathanhillman24
    @nathanhillman24 11 лет назад

    Thank you so much for making this video! I'm stuck in Stats with a teacher who cannot teach to save her life. Thanks!

  • @hpierce7661
    @hpierce7661 3 года назад

    You are wonderful!... Just Wonderful!!

  • @Iammillenial
    @Iammillenial 12 лет назад +1

    wow you make it so much more simpler. thank you!!

  • @Wyiren
    @Wyiren 6 лет назад

    sitting on my bed at 3 am as i regret taking that 6 hour nap earlier knowing i have a 9 page homework thankyou for saving me omg

  • @isabellec8328
    @isabellec8328 6 лет назад +9

    What if I don’t have the table? Can I figure this out someway?

  • @invader633
    @invader633 8 лет назад +4

    thank you!!! God Bless

  • @samsami8956
    @samsami8956 6 лет назад

    Your work is great. All what you need is to improve your logistic facilities; including the camera, board, and the light.

  • @katherinebryant3503
    @katherinebryant3503 5 лет назад

    BEST STATS TEACHER EVER!!

  • @syedashah9222
    @syedashah9222 6 лет назад

    simply the best stats teacher!!

  • @hipepe3172
    @hipepe3172 9 лет назад +5

    great video!!
    love you so much OMG

  • @kylienkate
    @kylienkate 8 лет назад

    Thank you so much for making these videos! I am also using mymathlab and the triola book in my online class. I really appreciate you and your insight.

  • @andre_tube..
    @andre_tube.. Год назад

    This video really helped me, thank you.

  • @kim_2014
    @kim_2014 7 лет назад

    Thank you , explained it so easy and broke it down step by step for me. thank you agin

  • @afifaalam6341
    @afifaalam6341 5 месяцев назад

    more then a decade later and here i am watching this days before my exam

  • @faizanali6101
    @faizanali6101 2 года назад

    Thanks for uploading this!

  • @heidic.andaya7051
    @heidic.andaya7051 5 лет назад +4

    6:17 *LMAO WHEN YOU'RE IN ART CLASS AND YOU SUCCESSFULLY DREW THIS ONE THING THAT LOOKED TERRIBLE BEFORE OOF AND YOU EVEN PAIR IT WITH A THUMBS-UP LMAO*

  • @aminaramly4986
    @aminaramly4986 5 лет назад +1

    This help me alot....I am a Master student and my exam of Biostatistic gonna be tomorrow 💙💙💙

  • @flaiirenn
    @flaiirenn Год назад

    this really helped me. thank you so much!

  • @tausifmulla
    @tausifmulla 5 лет назад

    Sir, you are an excellent teacher. This helped me in my PhD studies.

    • @crochetforfun8730
      @crochetforfun8730 2 года назад

      Woah u use this in your PhD😮for what, sorry I’m just curious

    • @tausifmulla
      @tausifmulla 2 года назад

      @@crochetforfun8730 I used it during my initial course work. Not just this but statistics in general

  • @kikianastasia
    @kikianastasia 6 лет назад

    thank youuuuuu!! bcuz of your videos now i understand very well about this..

  • @mamadetaslimtorabally7363
    @mamadetaslimtorabally7363 7 лет назад

    That's just so wonderful - thank you so much.

  • @asakiqi1
    @asakiqi1 12 лет назад

    Thank you very much. Very good video.Very simple and clear explanation.

  • @ma.victoriadiacos6178
    @ma.victoriadiacos6178 6 лет назад

    This video just saved my life.... thank you sooo much💖

  • @isuckatthisgame
    @isuckatthisgame Месяц назад

    3:10 but there isn't any number for probability that corresponds to .025, rather, you got to take a complement of that, which is .975, which is then 1.96 in terms of z score.

  • @sarcadistic9762
    @sarcadistic9762 5 лет назад +1

    Aww 😅 I'm a little disappointed since I was expecting some kind of algorithm that would allow me to compute the corresponding Z score of a given p-value without looking at the Z table. I don't really need a Z table since I could easily find the corresponding p-value with just a few taps on my calculator (which is allowed during my statistics exam) and I was hoping to find a way to work backwards from there.

  • @asmaahmed987
    @asmaahmed987 5 лет назад

    one of the best.

  • @tibahasan2066
    @tibahasan2066 11 лет назад

    I wonder why we don't want to get an area which is more than half in 7:48 , sir ?
    Thank you so much for your videos .. it has been a great help ! :)
    Bless you ^^

  • @anitannajoseph7796
    @anitannajoseph7796 6 лет назад

    So simple and great sir..
    It helped me really...

  • @UltraFEMinStinct
    @UltraFEMinStinct 6 лет назад

    YOU ARE A LIFE SAVER!

  • @alaaemad9311
    @alaaemad9311 4 года назад

    I watched a lot vedioes but this is the best between there ❤️😍

  • @brianj.3274
    @brianj.3274 10 лет назад

    One Smooooth Operator! Thank you, Sir.... B

  • @jonahreemonton5076
    @jonahreemonton5076 9 лет назад

    Please show an example of finding the value b such that P(-0.37 < Z < b) = 0.5749?

  • @AHumanVoice123
    @AHumanVoice123 7 лет назад

    You are wonderful sir. Love your videos and I learnt a lot. Keep posting please. Post some 'finding mew and s.d' please. How about poisson distribution? keep posting sir.

  • @sairaban0655
    @sairaban0655 6 лет назад

    Really helpful videos please upload videos regarding sampling error, sampling distribution of the mean & sampling distribution of the portion thanks.

  • @zainbsamman3932
    @zainbsamman3932 2 года назад

    That was really helpful thanks a lot 🧡

  • @ThapeloJustice
    @ThapeloJustice Год назад

    Thank you sir you saved my life

  • @poysermath
    @poysermath  11 лет назад

    Hi "jackd36". Yes, I do read these comments (good and bad ones). Well, look at the video again, beginning at minute 6:03. I show how to do a very similar problem to what you're asking about. Simply replace my P(z > ?) = 0.2389 with your P(z > ?) = 0.3300. The process is the same. Hope that helps!

  • @asdf7219
    @asdf7219 6 лет назад +1

    I just found out you can find it by invNorm(AREA, u, sd) now on the TI-Nspire

    • @ronbon1767
      @ronbon1767 6 лет назад

      This saved me so much time, you are a god

  • @EE-pq8yn
    @EE-pq8yn 7 лет назад

    I had a comment but i took it back...sorry.
    actually,your video is a big help!
    Thank you!
    I apologize!

  • @ahmedalkhaqani9061
    @ahmedalkhaqani9061 4 года назад

    You are amazing.

  • @ceylonunboxer
    @ceylonunboxer 3 года назад

    Nice video. Thank you.

  • @AlphyEmily
    @AlphyEmily 5 лет назад

    Thank you very much for the video.

  • @william-wallace
    @william-wallace 6 лет назад +2

    +poysermath
    7:52 is wrong, you have an extra one??? Please explain why this is right because I am confused now...

    • @avanthadilan9415
      @avanthadilan9415 5 лет назад

      William Wallace Let's assume unknown variable as x, question says probability of p(z>x)= 0.2389. but the positive table shows from minus area to plus area(upto +z). As you know the whole area is 1 and we want to find more than +z area, so we deduct the given area(0.2389) from 1.

  • @Erin-bc8ic
    @Erin-bc8ic 9 лет назад +1

    Is there any way to figure out how many standard deviations from a z value?

  • @CIDaniels
    @CIDaniels 5 лет назад

    Very clear! Thank you!

  • @ridmiratnayake9573
    @ridmiratnayake9573 3 года назад

    Thanks. This saved me.

  • @jojen17
    @jojen17 6 лет назад

    Amazing, that cleared up so much, thank you!

  • @cool7654321
    @cool7654321 7 лет назад +16

    *Throws tuition

  • @barbaravalencia5730
    @barbaravalencia5730 7 лет назад

    omg your videos are helping me so much! thank you!!

  • @leoniduvarov6565
    @leoniduvarov6565 6 лет назад

    Great video! very helpful.

  • @Combat9259
    @Combat9259 9 лет назад +4

    Idk how to do this because we are only allowed to use a + z score table

    • @vishnusekar9112
      @vishnusekar9112 9 лет назад +1

      Cameron Huffman In that case you just have to take the compliment of it and find the corresponding z-score..but now it will have a -ve before it

    • @Combat9259
      @Combat9259 9 лет назад

      Vishnu Sekar Yeah i ended up figuring that out, but thanks for the reply.

  • @se123acabaron
    @se123acabaron 7 лет назад

    Thank you very much! Very helpful video

  • @devarvinrc7017
    @devarvinrc7017 7 лет назад

    U r a life saver. Tq so much 🙏

  • @maleehamunawarrana6766
    @maleehamunawarrana6766 4 года назад

    Thanks 100+ times ..

  • @juliendark4208
    @juliendark4208 6 лет назад

    You are a life saver

  • @london7206
    @london7206 4 года назад

    ima marry this video

  • @babanlava
    @babanlava 5 лет назад

    Your videos are awesome

  • @friskybiscuits10
    @friskybiscuits10 8 лет назад

    thanks man, you are a legend

  • @AngorRandford
    @AngorRandford 10 лет назад

    I have a question:
    Given that z is a standard normal random variable, find the z for each situation.
    5.1) The area to the left of z is 0.2199
    5.2) The area to the right of z is 0.6915
    Help please
    Thanks in advance

  • @Duckyninja50
    @Duckyninja50 Год назад

    Great explanation

  • @janadrianfajut9238
    @janadrianfajut9238 7 лет назад

    helped me alot! thanks! keep it up homie

  • @Moon-wk9yl
    @Moon-wk9yl 8 лет назад

    That was really helpful, thank you so much.

  • @donnypangilinan2636
    @donnypangilinan2636 5 лет назад

    Thank you so much with this 😘😘😘
    It helps a lot.

  • @princeuniversegaming2210
    @princeuniversegaming2210 10 месяцев назад

    Clean ❤

  • @jasonipfatsiong2062
    @jasonipfatsiong2062 3 года назад

    Impressive thank you

  • @bsr1068
    @bsr1068 7 лет назад

    thank, you made it very simple