30 people ran a race and their race times, xxx, were recorded.
For these people ∑x=466∑x2=7592\sum x = 466 \quad \sum x^2 = 7592∑x=466∑x2=7592
Calculate the mean and the standard deviation for these data.
Practise Edexcel AS Level Maths Measures of Location and Spread with exam-style questions for AS Level Maths. 7 questions covering Measures of Central Tendency, Other Measures of Location, Measures of Spread, Variance and Standard Deviation, and Coding, matched to the Edexcel AS Level Maths (8MA0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.