Range and Quartiles
In this article we shall explore range and quartiles. Below is a quick summary of what is covered in this article. Summary Range of set of data is the difference between the highest and...
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Percentiles
This article explores percentiles. Percentiles split the data into 100 parts. A percentile (or a centile) is a measure used in statistics indicating the value below which a given percentage of collected data fall....
Mode, median, mean
In this article we shall explore the three measures of location used to describe the centre of a set of data, the mode, median, and mean. We can use the measure of location to...
Frequency tables and grouped data
This article explores grouped data, frequency tables and how to construct them. When you have a very large amount of data especially where the variables repeat you can simplify the data by using frequency...
Classification of variables
In this article we shall explore different types of data. In statistics you’ll be required to carry out observations and measurements of information or variables. The observations and measurements that you obtain are known...
Multiplying and simplifying complex numbers
In this article we shall explore how to multiply complex numbers and simplifying powers of i.
Finding the complex conjugate of a complex number
In this article we shall find the complex conjugate of a complex number. Below is a quick summary of what is covered in this article.
Real and imaginary numbers
In this article we’re going to be looking at how to use real and imaginary numbers. Below is a quick summary of what will be covered in this article. √(-1) = I and i²...
Addition and subtraction of surds
This article continues from a previous article. In this article we shall explore how to add and subtract surds. Just like any other forms of numbers we can add and subtract surds. But there...