Adam asked every teacher at his school how long it took them to travel to work. Adam's results are summarised in the summary statistics below.
n=84∑x=3581∑x2=184 092 n = 84 \quad \sum x = 3581 \quad \sum x^2 = 184\,092 n=84∑x=3581∑x2=184092Calculate 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 2.1 Measures of Central Tendency, 2.2 Other Measures of Location, 2.3 Measures of Spread, 2.4 Variance and Standard Deviation, and 2.5 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.