Noah recorded the number of pages read in one week by every student in his class. Noah's results are summarised in the summary statistics below.
n=50∑x=2125∑x2=101 625 n = 50 \quad \sum x = 2125 \quad \sum x^2 = 101\,625 n=50∑x=2125∑x2=101625Calculate the mean and the 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.