I have been trying to learn this for weeks and until I stumbled across your video, I could not understand it so I can’t thank you enough I’ll look forward to more of your videos. Thank you again again.
Although statics still gives me a headache, I have to say I have no clue what I would have done if I didn't find your channel! Thank you SO much for explaining everything as simple as you can!!!!
Never learned about standard deviation before, but need it for a report i am making, and after your 2 videos, i feel i already have a pretty good understanding of it and know how to use it practically. So big thanks from me :)
i've never has stats so easy. finally i understood why we did what we did. my teachers made it sound so darb and boring without the logic. een though you didnt get into it a lot, you made it clear as water. thank you so much. youre a great teacher. in india we call a teacher Guru, ergo, dhanyawadam guru ji. (thank you, dear teacher).
I think I would be hanging in your channel for the next four years, Professor. I am taking a BS in Psychology, and I will be looking forward for more concise lectures. :))
Could u link to something (or give keywords to search with) that explains why is it better to square than use the absolute value to get rid of the negative? ^^
Hi, a really great video about statistics ...I can't understand how just by putting (n-1) will approximate the sample to population SD or Variance ...plz tell
Great question! This is called Bessel's correction, and is basically used to adjust for the fact that, when using the sample mean in the formula for variance, we almost always underestimate variance (except when the sample mean equals the population mean). This is because the data in your sample will inherently gravitate closer to the sample mean to the population mean. Dividing by n-1 instead of n reduces that bias.
Kristen Moody Correct! This is not needed because 22.4 is the *entire* numerator of the formula. Creating the table leads you to “the sum of the squared deviations from the mean,” which is all you need for the numerator. I hope this helps!
