AQA A2 Geography - GEOG4a (19th June 2015)

That's really helpful, thankyouu

What's anyone put on ideas for who your results may be useful to in terms of psammoseres?

Anyone think of some advantages of using Spearman's Rank for data analysis?

Anyone think of some advantages of using Spearman's Rank for data analysis?

Shows type and strength of correlation, allows you to pick a hypothesis, test result for significance, result is objective, is this what you mean?

I'm literally just doing this now
This is what I have so far in very notey form (idk how useful it'll be to you buut):

Spearman’s Rank- used because we had two related variablesfor each hypotheses (PR, PLA, BW and BV in relation to the distance from site1). For the ‘describe’ one, describe how to do it + comparing to chart to find significance level- use PLA- gave us strong positive correlation of 0.84- accept aalternate hypothesis (that there is a correlation) and reject null- this however went against our original hypothesis as the PLA increased along the beach from West to East rather than decreased.
Appropriate because... within our maths range as an A Level geography class and we’d done it before
Useful because… it allowed us to question our initial geographic understanding on PLA as it gave us the opposite result to what expected-we eventually put this result down to recent beach replenishment- now we know to do it on an unmanaged beach if we were to do the investigation again I'm just about to do a chart for the general strengths and weaknesses of it so I'll send you that in a minute

Anyone think of some advantages of using Spearman's Rank for data analysis?

Strengths: Reduces weight of anomalies due to ranking, result can be easily checked using correlation shown by scatter graph, very precise- ie. More precise than just using scatter graph, can see significance level, proves/disproves hypotheses, doesn’t assume normal distribution??
Weaknesses: doesn’t use original data, takes a while to calculate

Hi people,

The fieldwork section is freaking me out a tad - our teacher's have made a 30 page document with different questions we could be asked & how we'd answer them & I have no idea how I'd come up with answers like those in the exam! I'm okay with the normal questions about data collection etc but there always seems to be a really random question for the fieldwork that I wouldn't call normal & one that really makes you think.

We did our fieldwork on city/town centres.

As for predictions for section B, my teacher suggested Chi-squared as it hasn't come up for a while & the last time it appeared was the same time standard deviation came up for AS - standard deviation came up this year for AS. Don't hold me to that prediction!

And I'm pretty sure you don't have to work anything out as everything is given, you just have to interpret the data!


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Do we need to know how to carry out the statistical tests then or just how to interpret them?

What's anyone put on ideas for who your results may be useful to in terms of psammoseres?

Mine is on shopping centres and the conclusions are always a bit iffy for me!

Great list, I saw a question about this on data collection, is that the only thing where you will have to talk about reliability and accuracy in your view?

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Part B is very likely to be stats isin't it? Stats has not come up since June 2012.

yeah i think it will be! make sure you know your Mann whitney U from your Spearmans rank correlation coefficient!!!