GCSE Statistics Chapter 4 Summary- Summarising Data

After completing this chapter, you will be able to;

• Work out measures of central tendency;
  • Find the mean, mode and median of raw data given as a list or as a frequency distribution
  • Estimate the mean and median of a grouped frequency distribution and identify the modal class
  • Understand the effects of transformations of data on the averages
  • Understand when each of these averages is appropriate
  • Calculate the weighted mean

• Work out measures of dispersion;
  • Work out the range of data given as a list or frequency distribution
  • Work out quartiles and percentiles
  • Draw box plots
  • Identify outliers
  • Calculate and use variance and standard deviation
  • Compare distributions of data

• Use simple index numbers, chain base index numbers and weighted index numbers;
  • Know about the retail prices index.