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ratios are just fractions not written in fraction form, for example 8:9 ratio just means the first value is 8/(8+9) and the second value is 9/(8+9)if a question says that in a ratio of green apples to red...

At A-Level there are eight different statistical tests that you need to be aware of.
Chi-square: Used for nominal data and independent groups, also used for nominal data and a correlation Sign Test:...

This equation can be solved by factorisation. Start off with brackets : (x )(x ) =0. We need two numbers that multiply to give 6 and add/subtract to give 1. Start off with 1 and 6. They multiply to give 6...

Draw out a diagram of a right angled triangle. As the lengths of the sides of the triangle are in the ratio 3:4:5, start off by saying each side is 3cm (a), 4cm (b) and 5cm (c) respectively, with 5cm bein...

At the beginning of the text, Smith opens with a complex sentence which gives much detail about the setting. This allows the reader to become immediately immersed within the scene as the sensory descripti...