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...system” is fair, it should also provide us with a means of comparing one country or region with another, even if those countries have different sizes of population or cover different land areas. Transcript Making comparisons the fair way Making comparisons in a fair way is one of the major aims of statistics. According to Hans Rosling, do you remember what he said about...

...systems are thus best considered to be in dynamic equilibrium – that is, they appear to be stable, but only over a certain duration of time. For example, Earth’s temperature over the last million or so years appears to be relatively constant. But since the Industrial Revolution of the 1850s – a relatively short timespan of 150 years – there has been a consistent...

...systems (such as combining forces) using vectors perform simple algebraic procedures using vectors...Introducing vectors for engineering applications: Background - It is common in engineering for physical phenomena to be represented as vector fields. A vector field is a mathematical representation of a system that describes how a quantity, such as a force, changes over an...