For the feature under investigation, establish a Hypothesis and then convert it to a Null Hypothesis (Null Hypothesis: why do we need it?
Well, in the investigative process it’s not possible to ‘prove’ something with 100% certainty – we only get to see and experience a part of the whole world, so it may be that what we think we’ve ‘proved’ in one place is ‘disproved’ in another.
These are found in tables or on graphs that have been calculated by statistical experts. The most common levels in geography are 95% and/or 99%.
These mean that 95 out of every 100 times you carried out these measurements (or 99 out of 100) you would get a similar result, but on 5 occasions (or 1) you may get ‘chance’ results.
He has written extensively about teaching and geography - with articles in the TES, Geography GCSE Wideworld and Teaching Geography.
Much cheaper & more effective than TES or the Guardian.If you’re interested, it’s the number of values in the final statistic that are allowed to vary. If our result is larger than the Critical Value – we have got a valid result in our data that lets us reject the null hypothesis and accept our original hypothesis.It our result is smaller than the Critical Value, we have to accept the null hypothesis – that there is no key geographical process observable in this data set.This leads on to the concepts of ‘confidence levels’ and ‘critical values’ (below).Imagine you were investigating the size of material deposited on a beach and noticed there were differences as you moved along the beach with pebbles seeming to become larger.Reach the audience you really want to apply for your teaching vacancy by posting directly to our website and related social media audiences.Topical articles, brand new case studies and expert exam advice will deepen your students' subject knowledge and help them develop independent learning skills. GCSE Geography for WJEC A is a stimulating and motivating course for the 21st century that looks at the key questions of our time such as, 'what is the evidence for climate change?They may be expressed in a range of ways: The second factor, after Confidence Level is the ‘Degrees of Freedom’ (df) to use.This is usually calculated as n-1 (number of data sets minus 1) which in this example is 5 (beach sites) -1 = 4.that – yes, we have noticed a valid geographical phenomenon that deserves further investigation as part of a geographical enquiry.Alternatively, it can indicate that what we think is a ‘phenomenon’ is actually just a random variation in the feature we’ve noticed, and doesn’t deserve further investigation or research.