Measures of central location - Mean
In this video, I show you how to calculate the mean for a set of data, what it means and I also touch on deviation about a mean. You are also shown how to solve this problem.
In order to get a grade A in his maths, Stuart must achieve a mean score of at least 80 points. If over the first 5 modules he has a mean score of 78. What is the lowest score needed in his final module in order to get an A grade?
For further revision on the mean see the Exam Questions