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# Geog4a help? Tweet

Geography, geology, tourism and environmental science discussion, revision, exam and homework help.

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1. Geog4a help?
So basically i have just come to start revising for the geog 4a exam next Tuesday and have no resources to actually revise from for the second part of the exam, the skills ( All i have is my text book which is the phillip Allen aqa a2, which only shows chi squared and Mann Whitney U, the additionals needed for the a2. My class never really went over much.

I am happy with the fieldwork side to the exam, but i was just wondering if someone wouldnt mind sharing me their notes or resources? Or even if someone could just tell me what i need to research and learn? ((
2. Re: Geog4a help?
3. Re: Geog4a help?
This is what I am needing too mate, especially on the Mann-Whitney U and Chi-Squared!
4. Re: Geog4a help?
Guys, mann whitney is simple really. It's not come up so I advise you look this up and learn how to do it.
There are some basic steps to mann whitney.
First you put data in to 2 columns e.g if you're looking at rainfall in two months and you take 6 readings in each month then do two columns for January and June (just for example). Then put in data from readings under each column. Rank each column lowest first BUT remember to rank both columns together. This means, don't do separate ranks for Jan and one for June. Combine them. If the data is as follows:

Jan Jun
200 80
300 200
150 170
400 100
450 70
310 60

Then you know that 60 is the lowest so that gets rank 1, then 70 gets rank 2, then 80 gets rank 3, then 100 gets rank 4, then you use 150 for rank 5 even though it's under Jan. So you go on like this...
Then once you've ranked them, you need to add up your ranks for each column..once this is done use the Mann whitney formula to input the figures. n1 and n2 are the sample sizes so basically 6 for Jan and 6 for Jun.
Hope this helps and please feel free to pass this on.
5. Re: Geog4a help?
(Original post by popnit)
Guys, mann whitney is simple really. It's not come up so I advise you look this up and learn how to do it.
There are some basic steps to mann whitney.
First you put data in to 2 columns e.g if you're looking at rainfall in two months and you take 6 readings in each month then do two columns for January and June (just for example). Then put in data from readings under each column. Rank each column lowest first BUT remember to rank both columns together. This means, don't do separate ranks for Jan and one for June. Combine them. If the data is as follows:

Jan Jun
200 80
300 200
150 170
400 100
450 70
310 60

Then you know that 60 is the lowest so that gets rank 1, then 70 gets rank 2, then 80 gets rank 3, then 100 gets rank 4, then you use 150 for rank 5 even though it's under Jan. So you go on like this...
Then once you've ranked them, you need to add up your ranks for each column..once this is done use the Mann whitney formula to input the figures. n1 and n2 are the sample sizes so basically 6 for Jan and 6 for Jun.
Hope this helps and please feel free to pass this on.
Thank you so much!! Mann Whitney came up
6. Re: Geog4a help?
That exam was great!