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Binomial Probability Using the TI-84
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- Опубліковано 18 сер 2024
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OMG OMG OMG YOU HAVE SAVED MY LIFE LITERALLY!
You have given me an edge to smash out my statistics unit to maintain my high GPA thanks to you!
Thank you so much for this I have watched so many videos, and have spent literally 15 hours doing math just today over probability.
Omg I've gone through like four of your videos today preparing for a test. Thank you so much ❤
now this is lifesaving, i love the way you gave this one exercise multiple problems and everything was so clear to understand. congrats on the video, high quality stuff
Thank you! Glad you found it helpful!
I just spent 2 days trying to figure this out for my online class. You helped me in less than 15 mins!
I'm glad my video helped. Sorry it took so long to find it.
I appreciate how you started over on a, b, c, d....You have really blessed me that I am confident of passing my final coming up in 3 hours. Thank you very much.
Good luck on your final! Happy to help!
Studying for Praxis for Math Education. My experience with these types of probability problems has been hit or miss and "piece-meal". As a tutor, I just follow whatever procedures my student's teachers prescribe., but I have not felt like an "expert." I am trying to organize my own mind, so that I don't have to "reorient" myself every single time I am presented with these types of probability questions.. This video was well-organized, and your explanation for cdf versus pdf was timely for me. Thank you! :)
There are a lot of rules with probability.
A LIFESAVER!!!! every video i watched couldn’t explain the less than to save their life
Thanks so much
You might just have saved my life as I have my IB math AA paper 2 exam tomorrow.
I don't know what I would do without this channel!
Glad you find it helpful!
Oh my god thank you so much, THANK YOU I WAS STRUGGLING BUT NOW I UNDERSTAND
OMG!! Thank you. I wish I would have found this hours ago!!!!
Thanks! My university uses stat crunch to do this, but I prefer to do these sorts on calculations on my calculator.
AN ANGEL ON EARTH!!!!
I love you so much, I really needed this
exactly what I was looking for. Thank you!!!!
Thank you so much 😊
I really needed this badly and thanks to you👏👏👏👏👏🇪🇹
Helped a lot
Holy crap this vid is amazing. Idk why my teacher didnt teach us this method
Not all teachers approve of technology!
THANK YOU SO MUCH 🙂!
Thank you so much, it's helpful, I was struggling to found the probability
You're welcome. Glad it helped.
Thank you, I love how you present your work its very helpful.
You're welcome. I'm glad that you found it helpful!
You just saved many hours of work thank you
You're welcome!
Beautiful video!
Thanks
Thanks well done.
Omg !!! Thank youuuuu for having the examplessss!!! Yesss!! Now I can work wack type ❤
thank you so much this really helps.
You're welcome
very helpful
This was really helpful, thanks a ton
thank you
Thank you very much for the vedio.
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THANK YOU!!!
You're welcome
Ty
💛👌thanks so much for this video!!!
You're welcome!
took time to find this but thank you thank you thank you
Soooo helpful
Glad to hear!
THANK UUUUY
You're Awesome
This just saved me so much time! Thank you for the demonstration. Could you perhaps tell me how to do a "between" 2 numbers? Say, between 7 and 9?
I'm happy to hear it helped you. If it says inclusive that means it includes both the 7 and 9, so you would do the binomcdf(n, p, 9)-binoncdf(n, p, 6). The reason you do the 6 is because binomcdf (n, p, 9) adds everything from 0 to 9, so you only want the values from 7 to 9, so you want to exclude everything from 0-6. Hopefully, that makes sense. You would just replace the n and the p with the values given to you in the problem. I would really appreciate it if you would subscribe! I have a lot of videos on my website mathandstatshelp.com/ . It is free for anyone to use.
@@MathandStatsHelp THANK YOU !!!
@@MathandStatsHelp Thank you!
@@MathandStatsHelp thank you!! I was looking for this❤
You're welcome
Thanks
You're welcome.
Ok I'll
appreciate this!! thank you!
Happy to hear it helped
@@brookeofarrell5994 yes it will. For the p just type in 2/5 (2 divided by 5). As long as the probability is between 0 and 1, it will work.
Lollll you just helped me out so much thank you 😏
Urgent!!! How do i change my screen to ask for the values instead of directly putting them myself????
I'm not sure what you are asking, based on this video.
P(X>=4) = 1-binomcdf(9.0.62,3) I don't understand Why X>=4 BUT you used number 3 at the last one ?
Because I'm excluding 0-3. I don't want to exclude the 4. I want it in my answer. If I used 4, then it would be excluded too.
How would you do this in the ti84 if it asked for between probability? Like between 3 and 5?
Or if it says at least 1? I’m so confused 😅
Between 3 and 5, you would need to subtract out what you don't want. If you do binomcdf(n,p,5) it adds up all the probabilities from 0 to 5. If you only want between 3 to 5, inclusive, you want to subtract out 0-2. You would do binomcdf(n,p, 5)-binomcdf(n,p,2)
For at least 1, you would just do 1 minus the probability of 0 successes. 1-binompdf(n,p,0)
I learnt in school that for n>=30 we can approximate to normal and work an answer for whatever the probability is, by adding continuity to our upper/lower limits, do we get the same answer as we would in just plugging the numbers in using a TI 84 calculator ?
In other words, If my question was let X-Bin(100,0.2) Find P(14
The answers will be slightly different, since binomial is discrete and normal is continuous. The binomial answer found using the binomcdf is going to me a more precise answer. The reason for using the normal estimate is that before technology it was to cumbersome to do hand calculations for large samples. The normal distribution would give a close estimate, because of the central limit theorem. If you are using an online platform for homework, it might not be programmed with both answers, and I would do it the way you were instructed in class. Some are programmed with both answers. Some teachers and professors are old school, and only use tables. The binomial table only goes to 20 or 30 depending on the book. I would reach out to your instructor to see if they would take both answers, or if they only want the normal estimate.
@@MathandStatsHelp Got it, thank you
Hi I have a problem, hopefully someone can answer it:
Whenever I go to Binom(cdf), I need to plug in a range of values, but my calculator is not giving me the option to do so. Please help.
I'm not sure if this is what you mean, but example f and g might help: ua-cam.com/video/3qHIJQ3JNk0/v-deo.html
thank you ssoooo much
You're welcome!
I know that its been a while since this video was made, but i hope that someone could answer how would enter knowing the percentage, and N and the probability is written as “between more then (number ) and less then ( number )”in the calculator? So its not asking this in separate questions? As in your demonstration.
Here's another video I made that addresses how to find between values: ua-cam.com/video/3qHIJQ3JNk0/v-deo.html The examples that address this start about 16 min 35 seconds into the video.
Thank so much! If i may ask another question, and using the same question as before how would you enter “ less then (8), or (15) or more? Would it be the same as the exclusive formula?
You would add the two together. Find the individual values, then add the two probabilities together.
Thanks so much. If you haven’t done so already, it would really be great to do a video with these types of problems that have two values and have ( between, and, or, less then and more than) etc...??
Isn't "At least 4" supposed to be :: P= more than or equal to 4? so shouldn't it be Binomcdf (9.6.2, 4) Why/how is it Binomcdf (9, 6.2, 3)??
Yes, at least means greater than or equal to. In the calculator, binomcdf starts with adding probabilities from 0 until you tell the calculator to stop. We don't want the values from 0 to 3 in our answer, so we use the compliment rule and do 1 - the sum of the probabilities of the values we want excluded.
Is there a way to get the calculator to solve P(x
There is not an inverse binomial button. I'm not 100% clear on what you're asking. Are you trying to find x? You could just try different values for x until you get the correct probability.
@@MathandStatsHelp I'm asking about the inverse yes, Basically the question gives me X belongs to Bin (10,0.2) and P (X
Unfortunately, no. They have inverse for t and normal distributions, but not binomial.
@@MathandStatsHelp Alright, Thank youuu
If my hw says "no more than" how would I put that in the calculator? is it the same thing? btw i love your videos they help so much!
No more than means less than. You would stop at one less than the given number. Let's say the given number is x, you would do binomcdf(n,p,x-1)
This video is a newer explanation: ua-cam.com/video/3qHIJQ3JNk0/v-deo.html
how about greater than equal?
Since you want the values that are greater than or equal to, you want to exclude all values less than. Say n=5, p=.25, and you want the probability x>=2, you would do 1-binomcdf(5, .25, 1). The last value you want excluded is x-1 or 1 less than the given value.
the video looks all messed up , the audio is fine
Don’t you have to consider q? The probability of failure?
You do if you are using hand calculations. The calculator is programmed to enter the values as nCx*p^x*(1 - p)^(n-x). If you recall, q=1-p.
OK, so this was time wasted: I specifically watched because I am having trouble entering 1-binon... and when you finally got there you 'forgot' and did some jimmy-rigged kind of entry - I can fumble my way through entering info - I want to know how to do it right in the first place. So this was not helpful. Please be mindful & meticulous when demonstrating techniques.
I'm sorry to hear that you didn't understand what you needed to. If you could be more specific as to what you were confused on, maybe I could help. If you just need to enter the 1- binomcdf(), you can enter the 1 - then go to the menu 2nd VARS and select the binomcdf, you don't have to do any shortcuts. You do have to be careful with the 1-bimoncdf to determine whether the value given is included or excluded. For example if it said more than 4 and your x was 10 and p was .35, since 4 is not included in the answer, you would enter 1 - 2nd VARS find binomcdf (10, .35, 4). You would enter the 4 because you want it excluded from your answer. If it said at least 4, you would do the 1 - 2nd VARS find binomcdf (10, .35, 3) because you only want to exclude 0-3 and you want the 4 to be included in the answer.
Oh My Goodness; I never expected a response; much less such a thorough, timely and helpful one. Your response gave me the exact guidance I was looking for and then some - thank you very much. I appreciate your kindness and your patience; STATS is so stressful, and you treated me with more regard than I deserved - it didn't go unnoticed and I truly thank you for that and for your help. Blessings to you! @@MathandStatsHelp
Glad you figured it out.
Speak more kindly next time! You're lucky you even got a reply.