In this tutorial we show you through an example how to calculate the mean and standard deviation of a normal distribution. The video tutorial has been split into two sections because of the time constraints posed by YouTube.

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

Why not try this first for revision and then check your answer with the worked solution.