I really like the clear explanation from this professor. Here I'd like to clarify a small typo. At 2:08, the professor showed the formula of calculating standard error(SE)=standard deviation/sqrt(N-1). Actually, the formula for SE should be SE=SD/sqrt(N) and the formula for standard deviation is SD=Sqrt (Sum((Xi - Xmean)^2)/(N-1)). The N-1 denominator is for estimating a sample variance.
@keeplearn In fact the correct formula for a NX(0,1) is SE = SDpop/sqrt(N). It is necessary to distinguish between SDsample and n from SDpop and N. Both are frequentist fictions anyway...
Thank you very much for the vid, but I see one small typo in your vid. between 2:48-2:50 you just use 101 instead of 100 which is the outcome of n-1 (in the denominator). Again, thanks for the vid.
This professor is awesome! She explained the complicated concepts in such a clear matter. I read tons of books and took several classes. But none of them make me fully understand the concepts than she did. THANK YOU SO MUCH!
If someone has more videos from this professor and is willing to post, that will be very very helpful.
Thank you, this is only the second of your vids I have watched but I'll be searching the rest. I study externally and I'm half way through this unit and I just you just made more sense of it than half a text book. keep doin what ya doin. Cheers
Wow, this is the first lesson on confidence intervals that I actually understand completely. Thanks!
chansetwo 1 year ago
bravo!!!
MegaEstadistico 1 year ago
thanks genius, wh dont u explain somthing useful like how to find a CI for a discrete distribution
mpdp85 1 year ago
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stephan1848 2 years ago
@stephan1848 z-score for 90% is 1.65 and z-score for 95% is 1.96
tommetjuuh 1 year ago
I really like the clear explanation from this professor. Here I'd like to clarify a small typo. At 2:08, the professor showed the formula of calculating standard error(SE)=standard deviation/sqrt(N-1). Actually, the formula for SE should be SE=SD/sqrt(N) and the formula for standard deviation is SD=Sqrt (Sum((Xi - Xmean)^2)/(N-1)). The N-1 denominator is for estimating a sample variance.
keeplearn 2 years ago
@keeplearn In fact the correct formula for a NX(0,1) is SE = SDpop/sqrt(N). It is necessary to distinguish between SDsample and n from SDpop and N. Both are frequentist fictions anyway...
caviper1 1 year ago
Thank you very much for the vid, but I see one small typo in your vid. between 2:48-2:50 you just use 101 instead of 100 which is the outcome of n-1 (in the denominator). Again, thanks for the vid.
sdy05 2 years ago
cool
spookyyeah 2 years ago
This was very helpful! Thank you!
christinerena 2 years ago
This was actually really useful, many thanks - :)
niallhill 3 years ago
Really well explained. Thank you!
It would be nice if you used a bigger surface for writing on though. It gets a little cluttered.
barnacle77 3 years ago
This professor is awesome! She explained the complicated concepts in such a clear matter. I read tons of books and took several classes. But none of them make me fully understand the concepts than she did. THANK YOU SO MUCH!
If someone has more videos from this professor and is willing to post, that will be very very helpful.
pfomby, Thank you for sharing these two!
keeplearn 3 years ago
Comment removed
keeplearn 3 years ago
Thank you, this is only the second of your vids I have watched but I'll be searching the rest. I study externally and I'm half way through this unit and I just you just made more sense of it than half a text book. keep doin what ya doin. Cheers
sepulturabest 3 years ago
Thank you Thank you Thank you!
lavedon 3 years ago
You certainly explained this in a better way than my professor thank you. :)
RastaCampbell 3 years ago