# Mathematics

### Casio Calculator for Statistics

#### Finding the mean and standard deviation of raw data

The following video clearly describes how to find the mean and the standard deviation of a set of data. You may watch more than once to get a clear idea of the use, after which it will become quite natural to you.

Mean, μ = Σx/n where n is the number of data; Standard Deviation, σ = Σ(x-μ)2/n

#### Finding the mean and standard deviation of tabular data

The following video clearly describes how to find the mean and the standard deviation of a set of data in a table. You may watch more than once to be familiar with entering data in a table.

Mean, μ = Σfx/Σf where f is the number of data of each class; Standard Deviation, σ = Σf(x-μ)2/Σf

##### Casio from Amazon

Maths is challenging; so is finding the right book. K A Stroud, in this book, cleverly managed to make all the major topics crystal clear with plenty of examples; popularity of the book speak for itself - 7th edition in print.

### Recommended - GCSE & iGCSE

This is the best book available for the new GCSE(9-1) specification and iGCSE: there are plenty of worked examples; a really good collection of problems for practising; every single topic is adequately covered; the topics are organized in a logical order.

### Recommended for A Level

This is the best book that can be recommended for the new A Level - Edexcel board: it covers every single topic in detail;lots of worked examples; ample problems for practising; beautifully and clearly presented.