Advanced Higher Geography

The next part of descriptive statistics gets a little more complicated. First you look at two measures of dispersion, which include range & inter-quartile range. You should be familiar with these from maths, but there's a few reminders in there about how to treat data if it's not straightforward.

You then go on to look at standard deviation. Again, you might be familiar with this from maths but please follow the steps in the worked example. During your tutorial, we will talk about the meaning of standard deviation and why it's useful.

Pebble analysis is a common technique used in river, glacial and beach studies. 

We will:

• Use a random strategy to sediment 

• Use callipers to measure pebble axes

• Use a roundness and angularity chart to learn about attrition of the sediment

• Talk about imbrication of sediment

• Use a systems diagram to describe the rock type