What type of math is this?

[waloshin]

I recognize mean, median and mode, but not the rest...

http://ursu.ca/assets/Documents/Exam%20Registry/GEOG/305/GEOG-305-1.pdf

http://upload.wikimedia.org/math/3/d/a/3da6e77cca6c503ce2bdbdc702e182f0.png (X - X) / n

http://upload.wikimedia.org/math/0/2/b/02b6d397e015e480420f59701c1a1d26.png = 0.01

[gerowen]

The big E looking thing is the "summation" sign. Basically means, "the sum of what follows".

[NovaAesa]

I'm not sure I understand you question. The type of maths would be "very introductory university statistics".

[matthew.ball]

Yep, just statistical modelling.

[3Miro]

The entire .pdf is about basic probability and statistics. Is this what you are asking?

[jfreak_]

University level Statistics.

[rich52x]

the symbol next to the '= 0.01' means directly proportional to.


EDIT: at least i think so

[Random_Dude]

the symbol next to the '= 0.01' means directly proportional to.


EDIT: at least i think so

The symbol does mean proportional, but that line is pretty strange, I think it's incorrect.
You should have something like: http://latex.codecogs.com/gif.latex?a%5Cpropto&space;b

One variable proportional to another, and not a proportional sign with nothing before and an equal sign and a constant after.

[beew]

the symbol next to the '= 0.01' means directly proportional to.


EDIT: at least i think so


No. This is not the proportional to sign, it is the Greek alphabet "alpha", it denotes the level of significance in statistics.

http://en.wikipedia.org/wiki/Statistical_significance

[StephanG]

I could be wrong, but that equation looks to me like it should be (sorry don't know how to make the summation character) :

E (x(i) - x(avg))/n

And what that basically means, is that you find the difference between each data point and the average (as calculated by either mean, median, mode, etc)

That will tell you how far, that data point is from the global average. And when you add all the differences together (The big E), and divide that by the number of data points, you get an idea of how accurate the actual data, in general, is compared to the average that you calculated for it.

For example, there are no places with a consistent tempature of 25 degrees celcius. The above equation, as I understand it, is meant to give the user an idea of how far removed from the average, data can tend to wander. So, if its a high number, it would show that the temperature, for example, fluctuates a lot. And if its a low number, it means that the temperatures stay pretty close to the average.

Hope that made sense. :D

[Random_Dude]

No. This is not the proportional to sign, it is the Greek alphabet "alpha", it denotes the level of significance in statistics.

http://en.wikipedia.org/wiki/Statistical_significance

Yeah I forgot about that. However, that symbol is not an alpha, but the correct form would be an alpha.
Here's the difference (the first is an alpha).

http://latex.codecogs.com/gif.latex?%5Calpha&space;%5Cpropto

[beew]

Yeah I forgot about that. However, that symbol is not an alpha, but the correct form would be an alpha.
Here's the difference (the first is an alpha).

http://latex.codecogs.com/gif.latex?%5Calpha&space;%5Cpropto


In the pdf file OP linked to that was written by hand (maybe there is another print occurrence but I only see the hand written one), so I think it was OP who has typed the wrong symbol.

[Random_Dude]

In the pdf file OP linked to that was written by hand (maybe there is another print occurrence but I only see the hand written one), so I think it was OP who has typed the wrong symbol.

In that case, by bad. I was referring to the one typed on the first post.

Cheers :cool:

[waloshin]

Any recommendation on a good book to get ready for Statistics?

[Random_Dude]

Any recommendation on a good book to get ready for Statistics?

I would suggest that you just get what your Professor recommends.

Cheers :cool:

[dh04000]

Reminds me ALOT of analytical chemistry, which focuses on statistics and deriving better data sets from RAW data.