I had to check when you posted the last video, because I didn't remember when I watched one of your videos the last time. No longer taking stats but it's impossible not to watch. You are simply awesome explaining this stuff.
Wish I had you as my statistics teacher in school. Like so many others here have commented, you provided a very intuitive answer to something I have been wondering abt for a long long time. Thx Mr. Nystrom and please keep more maths videos coming!👍👍
The reason you're so good at teaching is because you're focused on interaction, understanding and thinking: Instead of writing the answer right away, you ask us, the viewers, to think. Then you explain why we're thinking, and at the end, we understand. Thank you very much.
Thanks man! Great video again. I would love also to have an in depth explanation on the degrees of freedom. An explanation between the normal distribution and the Chebyshev distribution would be great too! Thanks again !
I am helping my son with this, and I found you...❤❤❤❤❤ it's like watch Steve Irwin talk about crocs or better yet, watching Steve on Blues Clues!!! Thank you for all your energy!!!
You are such a great teacher! I just asked this exact question on your other video explaining standard deviation whoops! Really appreciate the way you break things down and explain why everything is the way it is in the formulas. Great teaching style and personality:)
Thank you so much! My stats lecturer glossed over this and I've been worried all week... looks like I'll be following your channel all throughout university!
I've watched a few different teachers on RU-vid but I leave still feeling confused, your really good at explaining! Thank you! Keep doing what your doing!
SUCH A WELL THOUGHT OUT EXPLANATION. I came here after watching: Statquest: where he explains this n-1 thing using derivative of variance formula Dave Your Tutor: who explains using degrees of freedom Knan Academy: where Sal explains this using a simulation. Your video summed it all up so well...
Your awesome man. Keep up the good work. I do have a suggestion Keep letting loose & be yourself. Your passion & love of statistics is infectious. Hold nothing back, the craziervypu are, the more memorable
Good God...you are a math angel...that shit has puzzled the docket s outta me for too long......may peace and prosperity be upon your children's children ...thank you my brother..
I got this video recommended on Google and thought it would be absolutely unjust if I didn't hit the like button! Because this video is just sooo perfect! On point!! 👍👍
Just awesome, you just explained exactly what I needed. Currently, I am facing several problems trying to know which formula to use for different statistical parameters. You just helped me understand one of them, thank you very much.
You need to have all of your videos aired in every school in the world! I am 50 years old and I took statistics and earned an A from watching you and other videos.. Mainly yours... It just makes sense when you teach it. I applaud you!!!! #teacherofthecentury!!!1
Finally I understood the reason for n-1!! I got so irritated everytime I used n-1 without understanding the reason. Thanks for the simple and lively video.
Thx! It`s really vivid and clear explaination. I`d like to add on why n-1. Since it can be n+1. quote from wikipedia "In statistics, Bessel's correction is the use of n − 1 instead of n in the formula for the sample variance and sample standard deviation, where n is the number of observations in a sample. This method corrects the bias in the estimation of the population variance. It also partially corrects the bias in the estimation of the population standard deviation. However, the correction often increases the mean squared error in these estimations. This technique is named after Friedrich Bessel. "
Thank you sir, that made lots of sense and finally explains it for me. I'm not even studying stats or maths but just enjoy the topic and your videos are very clear and fun to watch. Keep it up!
Mr. Nystrom, YES it did make a TON of sense! I am re-learning statistics on my own. My book (by John Freund) explains what the sample standard deviation is for but doesn't go into all the detail that you do here. (1) The purpose of the sample is to get an unbiased picture of the population, and (2) the bigger the sample, the lesser the correction. BEAUTIFUL! Thank you!
Now I find hope again and I think I'll pass my stats course this year for sure. Thank you. 👏🏻👏🏻👏🏻 Universities should not be accepting any less professors than you, for real:))
Another way to look at is as follows. Does calculating the standard deviation of a sample with n=1 make sense? Also when one is calculating s, one uses xbar. So if you have n values, and you know (n-1) values and the average of n values, your nth value is not independent anymore.
Thanks this was just great. Not having a math background at all....and sitting exam next week for social science freaked me out....have to say you done more in these lessons than the lecturer done in 4 weeks! Blessings from Scotland.
So if in a TP of chemistry I measure the PH of my solution 6 times and I do a mean, must I use the Bessel correction to calculate the standard deviation? I mean, have I a sample in this case, or a population?
YOU ARE AMAZING!!! When I first found the video I thought there's no way Imma spend 12 minutes to find out why I came across two formulas for the standard deviation. Yet here I am more excited than ever about stats! thanks so much! And btw, could your or anybody reading these comments tell me the difference between the standard error and the standard deviation of the sample? Thanks a lot!
