I can't express how grateful I am for your videos, I just watched your video on Standard Errors and 95% Confidence Limits and this one! They have been extremely helpful, I have my ISA tomorrow and I think I understand the statistics tests now, so thank you:)
Hi! My teacher gave me a formula but it says n-1 on the bottom, instead of just n. Is she wrong or does it alter for some equations? Many thanks, your videos are so helpful!
There are two different standard deviations; one if we are using a sample taken from a population, and one if we are using the entire population. AQA does not discriminate if you use one rather than the other. Population has n on the bottom Sample has n-1 on the bottom Thanks for the kind words.
Aqa will accept either. If you have one that you're confident with..use it! They will not ask you to calculate SD...but may ask you to interpret results
I can't express how grateful I am for your videos, I just watched your video on Standard Errors and 95% Confidence Limits and this one! They have been extremely helpful, I have my ISA tomorrow and I think I understand the statistics tests now, so thank you:)
where are these ? i cant find them
hi sir how do we know which formula to apply to which question like the one just n or n-1
Thanks Mr Pollock. Here for A-Level Psychology purposes!
Very helpful video, thank you very much!
+Jay Patel Thanks for watching!
the formulae in the book Is n-1 not n
Exactly
Ikr
thanks for everything you rock!
thank you so much you helped me
Hi! My teacher gave me a formula but it says n-1 on the bottom, instead of just n. Is she wrong or does it alter for some equations? Many thanks, your videos are so helpful!
There are two different standard deviations; one if we are using a sample taken from a population, and one if we are using the entire population.
AQA does not discriminate if you use one rather than the other.
Population has n on the bottom
Sample has n-1 on the bottom
Thanks for the kind words.
Mr Pollock I don't understand, which one to use?
Aqa will accept either. If you have one that you're confident with..use it! They will not ask you to calculate SD...but may ask you to interpret results
Do you have a video for spearman rank? Emergency please reply quickly! Or any good video suggestions?
Y r u adding when it's "X-X" not X+X??
It's the sum of the mean subtracted from all the data values. To get the sum of them all you need to add them together. I know I'm seven months late.