The mean is calculated by adding all the values, then dividing by how many values there are. The sum of all the heights is 7∙7 m. Dividing this total by 5 gives the answer of 1∙54 m.

Effective assessment techniques are key to ensuring students understand mean, median, and mode. Use a variety of methods such as quizzes, oral questioning, or practical tasks to evaluate their ...

Mean? Mode? Median? Range? Easy! Learn how to spot the difference and take your maths skills above average using this BBC Bitesize guide for KS3 Mathematics.