Maya asked all 64 members of a cycling club how many kilometres they travelled to work each week. The results are summarised below, where n n\,n is the number of members, ∑x \sum x\,∑x is the total distance, and Sxx=∑(x−xˉ)2S_{xx}=\sum (x-\bar{x})^2Sxx=∑(x−xˉ)2.
Calculate the mean and the population standard deviation for these data.
32 exam-style questions on Edexcel AS Level Maths Measures of Location and Spread, 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. Each one has a worked solution and a mark scheme showing where the marks go.