How to calculate Margin of Error Confidence Interval for a population proportion
In this tutorial I explain and then calculate, using an example, the margin of error and confidence interval for a population proportion.
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Link To Playlist on Confidence Intervals
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Created by David Longstreet, Professor of the Universe, MyBookSucks
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Пікірлер: 92
Thanks for doing this. I have one feature request. I do not watch your videos in order. So whenever you say "i've discussed this in another video" it would be nice if you can provide a overlay link.
This man really knows what he is talking about. Everything he says is 100 % correct!
This is the best Stat video demonstration I've seen. Thank you so much! I love how you went step by step. You are the man!!!
Finally an explanation that makes sense! I appreciate how you explain each part of the formula and the meaning relative to the bell curve!
I appreciate that! Great to always hear my videos are helpful.
@statisticsfun Thank you for spending your time. I started to learn economics with you and managed to get 87% on my midterm exam (I'm a 1st year student of a well-known university in Moscow) . Now it's time for statistics.
These videos are lifesavers. Thank you soooooo much for making them.
THANK YOU!! I am taking a stats class (online) for my BSCJ and this video was a true Godsend!! All of these 'equations' are so confusing but the 'step-by-step' tutorial you provided helped BIG TIME!!
Your videos are so organized and helpful.I going to watch all of them.Thanks so much!!
I spent about 6 hours trying to get this from my text book, with no luck because it was so vague and assumed I knew all the terms for the equations. Your video was so clear for me. I wish I would have found you sooner. Thanks so much :-)
As everyone says, your vid is a real help! No annoying professor to make fun of students who can't get it right after explaining it at an ultrasonic speed! I was looking for a video that explains how to choose p* value when choosing the sample size, given the desired margin of error (0.01) and a confidence level of 99% ? ... The formula I'm talking about is : n= (z*/m)^2 (p*)(1-p*)
Your explanation is really awesome. So easy to understand in just one go and in such a short time. Thank you so much
You are absolutely GREAT! THANK YOU SO MUCH for saving my time with very detailed and informative video!
.....simple and superb illustrations....to get the concept
Thank you! That is what I am going for... simply, clear, concise. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help me get the word out about the educational videos.
"I just want you to pass stats." Exactly! Excellent video. You're the reason I'm getting an A in grad-level stats :-)
I added a link to videos on confidence intervals in the description of this video. Let me know if this does not help.
Bless your heart! This was absolutely 200% helpful and I now understand this perfectly.
Thankyou so much for this video i have spent hours trying to understand this concept and you simplified with a neat short video thankyou
Your videos are so helpful! Thank you so very much!!
Thank you so much!!!! It helped me understand each part of the problem!
Watching this 20 minutes before my stats final! WOOOO!
As they say better late than never and it is always great to hear my videos are helping students. While the official tag line of MyBookSucks is "Party More Study Less", in your case I hope my videos give you a bit more time to "Write More Music Study Less." I watched your songs and they are good, so keep writing, playing, singing and uploading. Good luck in your classes and with your music.
These videos are so helpful for my finals! :) Great explanations
Having been thrown into market research as a part of learning public relations, this videos have been invaluable to my classmates and I. Why couldn't you teach us this course? :)
wow your videos have been super helpful... Thanks!
Thanks heaps man! I didn't understand CI until now. Feeling slightly more...confident, if only for a small interval :)
Good question. The width of the confidence interval is the upper bound minus the lower bound.
You made my Life ! Thanks for this masterpiece
I am actually working on a video explaining that right now. I hope to have that done in a day or two.
Thank You!!! This was so helpful!
thank you so much I love this way to understand. Thanks for sharing
This is extremely helpful. Thanks.
Thank you very much. please keep em comming!
Thanks for the reply I am a computer science student working in vision\HCI and I am analyzing the data collected during user evaluations
A statistics joke, love it! Make sure you like MyBookSuck on Facebook too. See link in this video description.
OMFG this made everything so clear. Thank you!
@Paleoint Thanks for your comments much appreciated. There is not one single tool I use, I use a variety of different tools, Photoshop, Illustrator, Flash, Final Cut Studio and then put all these pieces and parts together in one video. They do take a while to put together, so I always appreciate feedback if I am hitting the mark or not.
@CherieJohnsonLibra Great to hear and appreciate the feedback.
simple and easy to understand as beginner..thanks alot..
Where were you all this time? Thank you!
Great video...I have a question, I am trying to analyse ordinal data collected through a five point Likert scale. Can I use the technqiue described here to specify confidence internvals for percentage of repsondents that will not give negative feedback?
Thanks for your help
cool! I hope this helps you pass with minimal frustration. Do let me know how you do.
Thanks for sharing. That sounds like a lot. How much for just the Animation once you know what you want to do?
How can i get it (x/n) if i haven't started my research yet in my methodology i am going to show the particular size is enough to be representative sampling for 133,139 population? Does it mean I need to predict x (interest)/ n (sample size)? Thanks... The x = estimated no. of voter vote for A party (can i refer to past studies and make this estimation number)? OR x = number of spoilt questionnaires I would collect from the 200 total questionnaires circulated?
Very helpful thank you!
Thank you, much appreciated!
Great to hear the videos are helpful. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help me spread the word about the educational videos.
This is fantastic! Math is so complicated, but you make it so easy to understand! Just one question though, I looked through all the video's in the confidence interval link you've provided, and I wasn't able to find a tutorial on Confidence Coefficients (the strange Z, that looks like a Z score but isn't). I can see you have many great video's but could you tell me which video explains how to calculate Confidence Coefficient, please? Thanks!! Sry I don't have a FB, otherwise I would like ur pg!
Yes, you should be able to use the proportional formula. I am curious to what you are studying or trying to figure out.
You are very welcome. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.
Many thanks. Make sure you like MyBookSucks on Facebook too. See the link in the video description.
Hello! Thank you very much for a great video. Can you please advise how below figures were calculated √.000274=.0165529=.0324; I can't really figure it out. How can i calculate this in TI BA II PLUS calculator. I am getting different figures when I calculat square root. Thank you very much.
Really nice
I know you said in your video you have videos about confidence coefficient and calculating it but I cant find them, could you send me a link please?
This was really helpful... except... where did you get the .56 from??????
You are a godsend.
Thank you so much for your compliment. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.
What do I do if I want to change the margin of error but keep the same confidence interval?
From the U of U. Thanks a ton! Might passed this 3070 class after all! BTW, what is the software you're doing this with? It's pleasant and wonderful. Much better than the 'chalkboard' scratches elsewhere.
I tried to use my ti84 to calculate the margin of error, and I was given a different answer than when I worked the problem out by hand. I went to 1-PropZInt, input 400,900, and .95, and I was given (.41198,.47691). Am I doing something wrong?
Thank you! Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.
you are my savior
So good
how do you do the animation? Is this just powerpoint?
Thank you
The square root of .000274 is equal too .0165529 and this times 1.96 = .0324. I would encourage you to go slow and don't skip steps. Good luck and hope this helps.
Many thanks and I appreciate the feedback. Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.
You are very welcome! Make sure you like MyBookSucks on FaceBook (see link in video description). This will help others find the educational videos.
thank you soooo much
great thanks.
@CherieJohnsonLibra Congrats on the good grades, great to know. Thanks for the feedback.
No it is not powerpoint, I use a variety of different software including photoshop, illustrator, HTML5, Final Cut, GarageBand and a few other products. Each video takes me a long time to create. My rule of thumb is each minute of video takes about 12 hours to create, so a 7 minute video takes me about 84 hours of development time.
Thank you so much this helped a lot! So what if the proportion was a percent? Like instead of showing 400 people liked the ice cream, what if it said something like 47% liked the ice cream?
Great video. Very easy to understand. But how we get that confidence level is 95%?
@jennypeon
3 жыл бұрын
I also would like to know this
it helped bt wht is the width of a confidence interval??
Mr Statsfun, Great job at taking it step by step..... One less thing for my tutor to teach me.. Koodos. And i have to throw this in, its REW TEH! Not RUT Sorry, LoL! But AWESOME Video Recommended to my Stats Class!
How do you get the 95 to 1.960
@aprilalfaro4964
8 жыл бұрын
+Aidan Curry you could find it on your z score table or chart. find .97500 see Z vertically to 1.9 and horizontally 06 so that is 1.96 and .06; or you can also find it on your T84
@headmaster2983
8 жыл бұрын
+April Alfaro but how do you get 95% to 1.96 using the chart? it doesn't make sense because 95% in decimal place is .9500, not .9750
@aprilalfaro4964
8 жыл бұрын
+headmaster2983 try averting .9505 and .9515 then yu get .951 ~ 95% and when you add 1.902 or works with .9750+.9744 equals 1.9494 I see that
@aprilalfaro4964
8 жыл бұрын
+headmaster2983 I mean AVERAGING
@micaelaroyo4837
6 жыл бұрын
To find the z score of 95, subtract 100 - 95, the add that number to 95. Turn that number into a decimal and check the z score chart in the area section, finding the z score on the sides
you are awesome thank you much professor. Thanks for being a cool stat cat =^-_-^=
That is the amount of time it takes to create the animation. Actually this is a similar amount of time it takes to create a "cartoon."
"THIS IS CALLED CONFIDENCE COEFICCIENT AND I DISCUSS THE MEANING OF THIS ON ANOTHER VIDEO"
💙💙💙💙💙💙
It should be illegal to make Stats look this easy... -__- haha