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51 thoughts on “Confidence intervals and margin of error | AP Statistics | Khan Academy

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  2. The assumptions: Each person being asked to is independent, true proportion not too close to 0 or 1. How and Why are these assumptions essential in concluding that the sample proportion follows a normal distribution?

  3. why dont u just do a simple version, you seriously overcomplicate it for those who are just trying to get a simple understanding.

  4. Watching this just helped me pass a quiz that required a pass in order to not fail the entire unit. Thanks heaps, you're a legend!

  5. What if the CI contains zero or one? From what I remember, it wouldn't be a statistically significant result then? I guess this is not possible when we're talking percentages, and is probably relevant only in the context of hypothesis testing? Is that correct? I DON'T LOVE statistics. It's too much assumption. Presumptuous "science".

  6. The issue that I have with this video is, after thoroughly over explaining population, sample, sample proportion, sample deviation of sample proportion and sampling distribution, he didn't have enough space to do a written explanation on how he got his Confidence Intervals and Margin of Error; which is ironic, being a part of the videos title and the only reason I clicked play 😉

  7. It would be nice if you state the Z critical value used in the 95% confidence, then it wouldn't be as confusing as for where you're getting the Confidence interval from.

  8. Many are saying this is too complicated for an intro, and maybe so. With that said, I found this to be an excellent example. Great job!

  9. And you didn't think it was important to explain where the Margin of Error value comes from even though it's in the title?

  10. Having the word problem written out first would have been better for me, so I can see the problem
    Going through it this way is lost me

  11. Thank you so much! This last week of stats kicked my butt and I thought this was going to do the same. You really simplified this in a manner that was easy to understand.

  12. that inference he made: that the true population proportion is within 2 sd of sample proportion cleared many questions for me. I was cofused before before watching this. thanks

  13. This guy is all over the place I need to make a video that streamlines the information rather than throwing out all these what if's to confuse people.

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