Mean and standard (or normal) deviation may be hard to understand at first, but with the help of this handy little guide from the pros at Exam Solutions you will be up to speed in no time.

In this video, you are shown how to calculate the mean and standard deviation from a normal distribution using the following example:

A high jumper knows from experience that she can clear a height of at least 1.78m once in 5 attempts. She also knows that she can clear a height of at least 1.65m on 7 out of 10 attempts. Find to 3 dp the mean and standard deviation of the heights the jumper can reach.

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