Standard Deviation & Variance The variance is another measure for the spread of the data, it measures the variability from the mean of the data. What is the variance and the standard deviation?...
Frequency Tables In most cases in your statistics course, you will come across data that is presented in a frequency table. These allow data to be summarised and make them easier to work with. Ungr...
Mean, Mode, Median What are mean, median and mode? Mean, median and mode are measures of location A measure of location gives information about where data is in the number system Mean, median and m...
Types of Data What are the different types of data? Qualitative data is data that is usually given in words not numbers to describe something For example: the colour of a teacher's car Quantitative...
Problem Solving using 3D Vectors Problem-solving with 3-D vectors 3-D vector problems can be solved using the same principles as 2-D vector problems (see Problem Solving using Vectors) Vectors can ...
Vectors in 3 Dimensions What is a 3-D vector? Vectors represent a movement of a certain magnitude (size) in a given directionYou should have already come across (2D) vectors at AS (see Basic Vector...
Problem Solving using Vectors Problem-solving with vectors Vectors can be used to prove two lines are parallel (see Vector Addition) They can also be used to show points are collinear (lie on the s...
Position Vectors What is a position vector? Position vectors describe the position of a point in relation to the origin They are different to direction vectors which describe the direction and dist...
Vector Addition Vector addition Adding vectors together lets us describes the movement between two points The single vector this creates is called the resultant vector Subtracting a vector is the s...
