Episode 7: The Weighted Mean

[@balonh1052]

I wonder if it has any difference from frequency sum

[@shahanaakter2683]

Thank you very much for the video, it is really helpful to understand weighted mean,you make my day happy

[@Alanisbusinessacademy]

You are so welcome!

[@mastermaxxs9473]

Thank you so much. This is very helpful.

[@christopherpurcell490]

Why does a weighted mean even exist if it comes out to be the same as a normal mean. It seems redundant and more complicated

[@alexis.kiyoko]

yes I dont get it. Whats the difference? Why are we using it?

[@amandayang4583]

@@alexis.kiyoko The significance of weight differs in the equation, for example, figure"18" plays a crucial role in this dataset as it takes up "4", and vice versa, figure"15" plays a meaningless role as it only takes up"1". It represents more clear than arithmetic mean.

[@undertakertv921]

Hi there, i'd like to know where is the rest of this course?!! cuz it seems there is more, so it would be awesome if you could upload the rest of this course, Thanks.

[@LeleKim1]

I ask the same question

[@juventusventuno9213]

Why not use a different sample set so the weighted result is different?

[@Balconex123]

Just dropped out of college. Haha good luck!

[@mimianna3993]

Thank you

[@mahaalbloshy6274]

Thank youuuuu so much, helped me a lot please keep going and upload more vids definitely will subscribe 👍🏼💜

[@Alanisbusinessacademy]

Thank you, I will

[@life42theuniverse]

It seems like a weighted mean will always give the same answer as a population/sample mean over the same data set. The weighted mean seems to be just a logical grouping by sameness that doesn't actually change the outcome. For instance. 2+4+8+6+2+2+6+9 = 3(2)+1(4)+2(6)+1(8)+1(9) the sum of the weights 3 +1+2+1+1 = n (the number of data points) So why calculate things differently.

[@Alanisbusinessacademy]

life42theuniverse With this method you can choose to provide more "weight" to one or more numbers in your sample. An arithmetic mean is simply adding the numbers together and dividing the total number of figures present in the data set.

[@life42theuniverse]

So is the "weight" assigned arbitrarily? Or is it based on frequency of data like in the video and my comment? If arbitrary or by certain rules perhaps you could do a video about choosing weights?

[@life42theuniverse]

life42theuniverse I found a real world example ... www.docbrown.info/page04/4_73calcs01ram.htm ... That is how to calculate relative mass of an element using all its isotopes.

[@hadiajaved1089]

excellent

[@janvishankar9837]

Thank u for such a useful video😀😀😀😀

[@rehabalsaleh166]

Bravo!

[@hazimalkurishy9012]

good job

[@genjieching2016]

now im using sigmas in math

[@xdfirexd515]

Sir weight is same like frequency isn't it

[@deepanshumahour3318]

Not at all...but this video conveys exactly what you are sayin...The weight is way different than frequency...I can't explain in text...but must suggest to watch an another video on it!

[@kateperculeza2892]

can i ask what is the meaning of n?

[@generationwolves]

n is the sample size (total number of values).

[@ainmartinez8186]

Sample

[@zorox9769]

كفوا ❤

[@shashwatadatta]

Wow noice

[@brandoncheung3180]

點解你個六字甘樣衰