The number of errors, xxx, on each of 25 pages of a magazine were recorded.
Here are the summarised results.
∑x=195 \sum x = 195 ∑x=195 ∑x2=6840 \sum x^2 = 6840 ∑x2=6840Calculate the standard deviation of the number of errors.
Give your answers to 3 significant figures.
Practise Edexcel GCSE Statistics Standard Deviation with exam-style questions for Foundation and Higher tier. 10 questions, matched to the Edexcel GCSE Statistics (1ST0) 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.