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When you are asked to compare two sets of data, you must compare: A measure of location mean/median\ /mode/quantile/percentile A measure of spread inter quartile range\ , inter per...
$$ \text{frequency daensity} = \frac{\text{frequency}}{\text{class width}} $$ The area of a bar is proportional to the frequency it represents Area of a bar is proportional to freq...
Mode modal is the most frequent value Median is the middle value Mean is the 'average' value $$ \bar{x} = \frac{\Sigma x}{n} $$
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census information from the entire population population the entire data set subset sampling frame a 'slice' of the population random sampling simple random number sampling done by...
Population is the whole dataset. The population contains every possible element that satisfies a specific predicate condition . Sample is a subset/slice of the population, it is of...
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NOTE Remember: axes is called a 'plane'. Notes Resultant force = net force in a plane x/y Friction is only effecting if the surface is "smooth" or "rough" Friction applies in the o...
Equations $$ \begin{array}{0} F = ma \\ W = mg \\ force = mass \times acceleration \\ weight = mass \times gravity \end{array} $$ Resolving Axes The resolving axes is represented b...
The formulae for constant motion $v=u+at$ can be used to model an object moving vertically under gravity. This is because all objects accelerate towards the earth at a constant rat...
S = displacement distance U = initial velocity V = final velocity A = acceleration T = time
About Mechanics deals with motion and the action of forces on objects . Mathematical models can be constructed to simulate real life situations but are often more abstract.