Frank asked every teacher at his school how long it took them to travel to work. Frank's results are summarised in the summary statistics below.
n=70∑x=1587Sxx=4879 n = 70 \quad \sum x = 1587 \quad S_{xx} = 4879 n=70∑x=1587Sxx=4879Calculate the mean and the standard deviation for these data.
Practise Edexcel A Level Maths Measures of Location and Spread with exam-style questions for A 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 A Level Maths (9MA0) specification and written in Paper 1, Paper 2 and Paper 3 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.
